1256151 has 16 divisors (see below), whose sum is σ = 1863680. Its totient is φ = 747360.

The previous prime is 1256149. The next prime is 1256161. The reversal of 1256151 is 1516521.

It is not a de Polignac number, because 1256151 - 2¹ = 1256149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 690 + ... + 1728.

It is an arithmetic number, because the mean of its divisors is an integer number (116480).

2^1256151 is an apocalyptic number.

1256151 is a deficient number, since it is larger than the sum of its proper divisors (607529).

1256151 is a wasteful number, since it uses less digits than its factorization.

1256151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1086.

The product of its digits is 300, while the sum is 21.

The square root of 1256151 is about 1120.7814238289. The cubic root of 1256151 is about 107.8981378391.

The spelling of 1256151 in words is "one million, two hundred fifty-six thousand, one hundred fifty-one".