1252401616 has 40 divisors (see below), whose sum is σ = 2473797024. Its totient is φ = 614121600.

The previous prime is 1252401613. The next prime is 1252401649. The reversal of 1252401616 is 6161042521.

It is a super-2 number, since 2×1252401616² = 3137019615518822912, which contains 22 as substring.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252401613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169291 + ... + 176533.

Almost surely, 2^1252401616 is an apocalyptic number.

1252401616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1252401616 is a deficient number, since it is larger than the sum of its proper divisors (1221395408).

1252401616 is a wasteful number, since it uses less digits than its factorization.

1252401616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7459 (or 7453 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1252401616 is about 35389.2867404812. The cubic root of 1252401616 is about 1077.9067869740.

The spelling of 1252401616 in words is "one billion, two hundred fifty-two million, four hundred one thousand, six hundred sixteen".