1256842028 has 48 divisors (see below), whose sum is σ = 2512218240. Its totient is φ = 545040384.

The previous prime is 1256841979. The next prime is 1256842051. The reversal of 1256842028 is 8202486521.

It is a junction number, because it is equal to n+sod(n) for n = 1256841982 and 1256842000.

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, 974408 + ... + 975696.

It is an arithmetic number, because the mean of its divisors is an integer number (52337880).

Almost surely, 2^1256842028 is an apocalyptic number.

It is an amenable number.

1256842028 is a deficient number, since it is larger than the sum of its proper divisors (1255376212).

1256842028 is a wasteful number, since it uses less digits than its factorization.

1256842028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426 (or 2424 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 38.

The square root of 1256842028 is about 35451.9679002450. The cubic root of 1256842028 is about 1079.1791968757.

The spelling of 1256842028 in words is "one billion, two hundred fifty-six million, eight hundred forty-two thousand, twenty-eight".