1256878292 has 24 divisors (see below), whose sum is σ = 2228990400. Its totient is φ = 620054336.

The previous prime is 1256878267. The next prime is 1256878297. The reversal of 1256878292 is 2928786521.

It is a self number, because there is not a number n which added to its sum of digits gives 1256878292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256878297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175559 + ... + 182577.

It is an arithmetic number, because the mean of its divisors is an integer number (92874600).

Almost surely, 2^1256878292 is an apocalyptic number.

It is an amenable number.

1256878292 is a deficient number, since it is larger than the sum of its proper divisors (972112108).

1256878292 is a wasteful number, since it uses less digits than its factorization.

1256878292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7615 (or 7613 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 1256878292 is about 35452.4793491231. The cubic root of 1256878292 is about 1079.1895760581.

The spelling of 1256878292 in words is "one billion, two hundred fifty-six million, eight hundred seventy-eight thousand, two hundred ninety-two".