1065721151 has 8 divisors (see below), whose sum is σ = 1167239808. Its totient is φ = 964975000.

The previous prime is 1065721141. The next prime is 1065721157. The reversal of 1065721151 is 1511275601.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1065721151 - 2¹⁴ = 1065704767 is a prime.

It is a super-2 number, since 2×1065721151² = 2271523143377529602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065721157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190235 + ... + 195756.

It is an arithmetic number, because the mean of its divisors is an integer number (145904976).

Almost surely, 2^1065721151 is an apocalyptic number.

1065721151 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1065721151 is a deficient number, since it is larger than the sum of its proper divisors (101518657).

1065721151 is a wasteful number, since it uses less digits than its factorization.

1065721151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386253.

The product of its (nonzero) digits is 2100, while the sum is 29.

The square root of 1065721151 is about 32645.3848346133. The cubic root of 1065721151 is about 1021.4439216218.

Adding to 1065721151 its reverse (1511275601), we get a palindrome (2576996752).

The spelling of 1065721151 in words is "one billion, sixty-five million, seven hundred twenty-one thousand, one hundred fifty-one".