1264644225 has 96 divisors (see below), whose sum is σ = 2583168000. Its totient is φ = 602380800.

The previous prime is 1264644203. The next prime is 1264644257. The reversal of 1264644225 is 5224464621.

1264644225 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 644 + 2 + 2 + 5 = 666.

It is not a de Polignac number, because 1264644225 - 2⁸ = 1264643969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1264644225.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 269701 + ... + 274349.

It is an arithmetic number, because the mean of its divisors is an integer number (26908000).

Almost surely, 2^1264644225 is an apocalyptic number.

1264644225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264644225 is an abundant number, since it is smaller than the sum of its proper divisors (1318523775).

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

1264644225 is a wasteful number, since it uses less digits than its factorization.

1264644225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4712 (or 4701 counting only the distinct ones).

The product of its digits is 92160, while the sum is 36.

The square root of 1264644225 is about 35561.8366370467. The cubic root of 1264644225 is about 1081.4076937075.

The spelling of 1264644225 in words is "one billion, two hundred sixty-four million, six hundred forty-four thousand, two hundred twenty-five".