1256057 has 8 divisors (see below), whose sum is σ = 1386720. Its totient is φ = 1128160.

The previous prime is 1256041. The next prime is 1256063. The reversal of 1256057 is 7506521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1256057 - 2⁴ = 1256041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338 + ... + 1620.

It is an arithmetic number, because the mean of its divisors is an integer number (173340).

2^1256057 is an apocalyptic number.

It is an amenable number.

1256057 is a deficient number, since it is larger than the sum of its proper divisors (130663).

1256057 is a wasteful number, since it uses less digits than its factorization.

1256057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 1256057 is about 1120.7394880167. The cubic root of 1256057 is about 107.8954463692.

The spelling of 1256057 in words is "one million, two hundred fifty-six thousand, fifty-seven".