1265641025 has 12 divisors (see below), whose sum is σ = 1712067504. Its totient is φ = 920466000.

The previous prime is 1265640983. The next prime is 1265641049. The reversal of 1265641025 is 5201465621.

It is not a de Polignac number, because 1265641025 - 2²⁸ = 997205569 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1265640982 and 1265641000.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2300891 + ... + 2301440.

It is an arithmetic number, because the mean of its divisors is an integer number (142672292).

Almost surely, 2^1265641025 is an apocalyptic number.

It is an amenable number.

1265641025 is a deficient number, since it is larger than the sum of its proper divisors (446426479).

1265641025 is a wasteful number, since it uses less digits than its factorization.

1265641025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602352 (or 4602347 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1265641025 is about 35575.8489006236. The cubic root of 1265641025 is about 1081.6917430544.

The spelling of 1265641025 in words is "one billion, two hundred sixty-five million, six hundred forty-one thousand, twenty-five".