1252511613 has 32 divisors (see below), whose sum is σ = 1871683200. Its totient is φ = 827798400.

The previous prime is 1252511609. The next prime is 1252511641. The reversal of 1252511613 is 3161152521.

1252511613 is a `hidden beast` number, since 1 + 25 + 25 + 1 + 1 + 613 = 666.

It is not a de Polignac number, because 1252511613 - 2² = 1252511609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252511683) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2403793 + ... + 2404313.

It is an arithmetic number, because the mean of its divisors is an integer number (58490100).

Almost surely, 2^1252511613 is an apocalyptic number.

It is an amenable number.

1252511613 is a deficient number, since it is larger than the sum of its proper divisors (619171587).

1252511613 is a wasteful number, since it uses less digits than its factorization.

1252511613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1124 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1252511613 is about 35390.8408066268. The cubic root of 1252511613 is about 1077.9383431565.

The spelling of 1252511613 in words is "one billion, two hundred fifty-two million, five hundred eleven thousand, six hundred thirteen".