1264245785 has 32 divisors (see below), whose sum is σ = 1716850944. Its totient is φ = 885600000.

The previous prime is 1264245743. The next prime is 1264245799. The reversal of 1264245785 is 5875424621.

It is not a de Polignac number, because 1264245785 - 2⁸ = 1264245529 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202460 + ... + 208610.

It is an arithmetic number, because the mean of its divisors is an integer number (53651592).

Almost surely, 2^1264245785 is an apocalyptic number.

It is an amenable number.

1264245785 is a deficient number, since it is larger than the sum of its proper divisors (452605159).

1264245785 is a wasteful number, since it uses less digits than its factorization.

1264245785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6305.

The product of its digits is 537600, while the sum is 44.

The square root of 1264245785 is about 35556.2341228651. The cubic root of 1264245785 is about 1081.2941120030.

The spelling of 1264245785 in words is "one billion, two hundred sixty-four million, two hundred forty-five thousand, seven hundred eighty-five".