1256427 has 12 divisors (see below), whose sum is σ = 1829880. Its totient is φ = 830688.

The previous prime is 1256407. The next prime is 1256429. The reversal of 1256427 is 7246521.

1256427 is a `hidden beast` number, since 12 + 5 + 642 + 7 = 666.

It is not a de Polignac number, because 1256427 - 2¹² = 1252331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1256427.

It is not an unprimeable number, because it can be changed into a prime (1256429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 724 + ... + 1742.

It is an arithmetic number, because the mean of its divisors is an integer number (152490).

2^1256427 is an apocalyptic number.

1256427 is a deficient number, since it is larger than the sum of its proper divisors (573453).

1256427 is a wasteful number, since it uses less digits than its factorization.

1256427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162 (or 1159 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 1256427 is about 1120.9045454453. The cubic root of 1256427 is about 107.9060396771.

The spelling of 1256427 in words is "one million, two hundred fifty-six thousand, four hundred twenty-seven".