1269872564 has 12 divisors (see below), whose sum is σ = 2223089988. Its totient is φ = 634704000.

The previous prime is 1269872521. The next prime is 1269872567. The reversal of 1269872564 is 4652789621.

It can be written as a sum of positive squares in 2 ways, for example, as 465696400 + 804176164 = 21580^2 + 28358^2 .

It is a super-2 number, since 2×1269872564² = 3225152657599868192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269872567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45467 + ... + 67874.

It is an arithmetic number, because the mean of its divisors is an integer number (185257499).

Almost surely, 2^1269872564 is an apocalyptic number.

It is an amenable number.

1269872564 is a deficient number, since it is larger than the sum of its proper divisors (953217424).

1269872564 is a wasteful number, since it uses less digits than its factorization.

1269872564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116146 (or 116144 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 50.

The square root of 1269872564 is about 35635.2713473603. The cubic root of 1269872564 is about 1082.8959099565.

The spelling of 1269872564 in words is "one billion, two hundred sixty-nine million, eight hundred seventy-two thousand, five hundred sixty-four".