1265775725 has 48 divisors (see below), whose sum is σ = 1732270080. Its totient is φ = 913809600.

The previous prime is 1265775703. The next prime is 1265775737. The reversal of 1265775725 is 5275775621.

It is not a de Polignac number, because 1265775725 - 2¹² = 1265771629 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265775725.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 985934 + ... + 987216.

It is an arithmetic number, because the mean of its divisors is an integer number (36088960).

Almost surely, 2^1265775725 is an apocalyptic number.

It is an amenable number.

1265775725 is a deficient number, since it is larger than the sum of its proper divisors (466494355).

1265775725 is a wasteful number, since it uses less digits than its factorization.

1265775725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410 (or 1405 counting only the distinct ones).

The product of its digits is 1029000, while the sum is 47.

The square root of 1265775725 is about 35577.7419884961. The cubic root of 1265775725 is about 1081.7301158911.

The spelling of 1265775725 in words is "one billion, two hundred sixty-five million, seven hundred seventy-five thousand, seven hundred twenty-five".