1560961081 has 3 divisors (see below), whose sum is σ = 1561000591. Its totient is φ = 1560921572.

The previous prime is 1560961049. The next prime is 1560961091. The reversal of 1560961081 is 1801690651.

The square root of 1560961081 is 39509.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1801690651 = 17 ⋅105981803.

It can be written as a sum of positive squares in only one way, i.e., 334560681 + 1226400400 = 18291^2 + 35020^2 .

It is not a de Polignac number, because 1560961081 - 2⁵ = 1560961049 is a prime.

It is a super-2 number, since 2×1560961081² = 4873198992793377122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1560961081.

It is not an unprimeable number, because it can be changed into a prime (1560961021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 19755 + ... + 59263.

Almost surely, 2^1560961081 is an apocalyptic number.

1560961081 is the 39509-th square number.

1560961081 is the 19755-th centered octagonal number.

It is an amenable number.

1560961081 is a deficient number, since it is larger than the sum of its proper divisors (39510).

1560961081 is an frugal number, since it uses more digits than its factorization.

1560961081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79018 (or 39509 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 37.

The cubic root of 1560961081 is about 1160.0161217042.

The spelling of 1560961081 in words is "one billion, five hundred sixty million, nine hundred sixty-one thousand, eighty-one".