1265207525 has 24 divisors (see below), whose sum is σ = 1582261824. Its totient is φ = 1003564800.

The previous prime is 1265207521. The next prime is 1265207539. The reversal of 1265207525 is 5257025621.

It is not a de Polignac number, because 1265207525 - 2² = 1265207521 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265207521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2215490 + ... + 2216060.

It is an arithmetic number, because the mean of its divisors is an integer number (65927576).

Almost surely, 2^1265207525 is an apocalyptic number.

It is an amenable number.

1265207525 is a deficient number, since it is larger than the sum of its proper divisors (317054299).

1265207525 is a wasteful number, since it uses less digits than its factorization.

1265207525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 1265207525 is about 35569.7557624452. The cubic root of 1265207525 is about 1081.5682306976.

The spelling of 1265207525 in words is "one billion, two hundred sixty-five million, two hundred seven thousand, five hundred twenty-five".