1252565886 has 128 divisors (see below), whose sum is σ = 3048192000. Its totient is φ = 338088960.

The previous prime is 1252565879. The next prime is 1252565893. The reversal of 1252565886 is 6885652521.

It is an interprime number because it is at equal distance from previous prime (1252565879) and next prime (1252565893).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3588840 + ... + 3589188.

It is an arithmetic number, because the mean of its divisors is an integer number (23814000).

Almost surely, 2^1252565886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1252565886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1524096000).

1252565886 is an abundant number, since it is smaller than the sum of its proper divisors (1795626114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1252565886 is a wasteful number, since it uses less digits than its factorization.

1252565886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514.

The product of its digits is 1152000, while the sum is 48.

The square root of 1252565886 is about 35391.6075645060. The cubic root of 1252565886 is about 1077.9539124340.

The spelling of 1252565886 in words is "one billion, two hundred fifty-two million, five hundred sixty-five thousand, eight hundred eighty-six".