1268570689 has 3 divisors (see below), whose sum is σ = 1268606307. Its totient is φ = 1268535072.

The previous prime is 1268570671. The next prime is 1268570711. The reversal of 1268570689 is 9860758621.

The square root of 1268570689 is 35617.

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: 9860758621 = 7 ⋅1408679803.

It can be written as a sum of positive squares in only one way, i.e., 462465025 + 806105664 = 21505^2 + 28392^2 .

It is not a de Polignac number, because 1268570689 - 2¹¹ = 1268568641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268570629) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17809 + ... + 53425.

It is an arithmetic number, because the mean of its divisors is an integer number (422868769).

Almost surely, 2^1268570689 is an apocalyptic number.

1268570689 is the 35617-th square number.

1268570689 is the 17809-th centered octagonal number.

It is an amenable number.

1268570689 is a deficient number, since it is larger than the sum of its proper divisors (35618).

1268570689 is an frugal number, since it uses more digits than its factorization.

1268570689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71234 (or 35617 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 52.

The cubic root of 1268570689 is about 1082.5257213245.

The spelling of 1268570689 in words is "one billion, two hundred sixty-eight million, five hundred seventy thousand, six hundred eighty-nine".