1264421625 has 32 divisors (see below), whose sum is σ = 2139696000. Its totient is φ = 662916800.

The previous prime is 1264421621. The next prime is 1264421651. The reversal of 1264421625 is 5261244621.

It is not a de Polignac number, because 1264421625 - 2² = 1264421621 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264421621) 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, 6450 + ... + 50699.

It is an arithmetic number, because the mean of its divisors is an integer number (66865500).

Almost surely, 2^1264421625 is an apocalyptic number.

1264421625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264421625 is a deficient number, since it is larger than the sum of its proper divisors (875274375).

1264421625 is an equidigital number, since it uses as much as digits as its factorization.

1264421625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57226 (or 57216 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 1264421625 is about 35558.7067397002. The cubic root of 1264421625 is about 1081.3442409533.

The spelling of 1264421625 in words is "one billion, two hundred sixty-four million, four hundred twenty-one thousand, six hundred twenty-five".