1256771 has 8 divisors (see below), whose sum is σ = 1317888. Its totient is φ = 1197000.

The previous prime is 1256753. The next prime is 1256777. The reversal of 1256771 is 1776521.

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

It is a cyclic number.

It is not a de Polignac number, because 1256771 - 2⁶ = 1256707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256777) 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, 1916 + ... + 2486.

It is an arithmetic number, because the mean of its divisors is an integer number (164736).

2^1256771 is an apocalyptic number.

1256771 is a deficient number, since it is larger than the sum of its proper divisors (61117).

1256771 is an equidigital number, since it uses as much as digits as its factorization.

1256771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673.

The product of its digits is 2940, while the sum is 29.

The square root of 1256771 is about 1121.0579824434. The cubic root of 1256771 is about 107.9158867250.

The spelling of 1256771 in words is "one million, two hundred fifty-six thousand, seven hundred seventy-one".