1294257864 has 64 divisors (see below), whose sum is σ = 3288781440. Its totient is φ = 424363520.

The previous prime is 1294257857. The next prime is 1294257883. The reversal of 1294257864 is 4687524921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1357612 + ... + 1358564.

It is an arithmetic number, because the mean of its divisors is an integer number (51387210).

Almost surely, 2^1294257864 is an apocalyptic number.

It is an amenable number.

1294257864 is an abundant number, since it is smaller than the sum of its proper divisors (1994523576).

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

1294257864 is a wasteful number, since it uses less digits than its factorization.

1294257864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1830 (or 1826 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 1294257864 is about 35975.7955297725. The cubic root of 1294257864 is about 1089.7836071289.

The spelling of 1294257864 in words is "one billion, two hundred ninety-four million, two hundred fifty-seven thousand, eight hundred sixty-four".