1265372965 has 4 divisors (see below), whose sum is σ = 1518447564. Its totient is φ = 1012298368.

The previous prime is 1265372957. The next prime is 1265373023. The reversal of 1265372965 is 5692735621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5692735621 = 409 ⋅13918669.

It can be written as a sum of positive squares in 2 ways, for example, as 880546276 + 384826689 = 29674^2 + 19617^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265372965 - 2³ = 1265372957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126537292 + ... + 126537301.

It is an arithmetic number, because the mean of its divisors is an integer number (379611891).

Almost surely, 2^1265372965 is an apocalyptic number.

It is an amenable number.

1265372965 is a deficient number, since it is larger than the sum of its proper divisors (253074599).

1265372965 is an equidigital number, since it uses as much as digits as its factorization.

1265372965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253074598.

The product of its digits is 680400, while the sum is 46.

The square root of 1265372965 is about 35572.0812576380. The cubic root of 1265372965 is about 1081.6153710141.

The spelling of 1265372965 in words is "one billion, two hundred sixty-five million, three hundred seventy-two thousand, nine hundred sixty-five".