1238564925 has 72 divisors (see below), whose sum is σ = 2477695584. Its totient is φ = 609716160.

The previous prime is 1238564849. The next prime is 1238564947. The reversal of 1238564925 is 5294658321.

It is not a de Polignac number, because 1238564925 - 2¹⁷ = 1238433853 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 71134 + ... + 86816.

Almost surely, 2^1238564925 is an apocalyptic number.

1238564925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1238564925 is an abundant number, since it is smaller than the sum of its proper divisors (1239130659).

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

1238564925 is a wasteful number, since it uses less digits than its factorization.

1238564925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15721 (or 15704 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 1238564925 is about 35193.2511285900. The cubic root of 1238564925 is about 1073.9224609293.

The spelling of 1238564925 in words is "one billion, two hundred thirty-eight million, five hundred sixty-four thousand, nine hundred twenty-five".