1264137825 has 12 divisors (see below), whose sum is σ = 2090041328. Its totient is φ = 674206800.

The previous prime is 1264137769. The next prime is 1264137829. The reversal of 1264137825 is 5287314621.

It is not a de Polignac number, because 1264137825 - 2⁶ = 1264137761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1264137829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8427511 + ... + 8427660.

Almost surely, 2^1264137825 is an apocalyptic number.

1264137825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264137825 is a deficient number, since it is larger than the sum of its proper divisors (825903503).

1264137825 is a wasteful number, since it uses less digits than its factorization.

1264137825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16855184 (or 16855179 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 1264137825 is about 35554.7159319267. The cubic root of 1264137825 is about 1081.2633321666.

The spelling of 1264137825 in words is "one billion, two hundred sixty-four million, one hundred thirty-seven thousand, eight hundred twenty-five".