2556146 has 16 divisors (see below), whose sum is σ = 4073760. Its totient is φ = 1199520.

The previous prime is 2556143. The next prime is 2556149. The reversal of 2556146 is 6416552.

It is an interprime number because it is at equal distance from previous prime (2556143) and next prime (2556149).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2556143) 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, 4961 + ... + 5451.

It is an arithmetic number, because the mean of its divisors is an integer number (254610).

2^2556146 is an apocalyptic number.

2556146 is a deficient number, since it is larger than the sum of its proper divisors (1517614).

2556146 is a wasteful number, since it uses less digits than its factorization.

2556146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649.

The product of its digits is 7200, while the sum is 29.

The square root of 2556146 is about 1598.7951713712. The cubic root of 2556146 is about 136.7293928466.

It can be divided in two parts, 25 and 56146, that multiplied together give a triangular number (1403650 = T₁₆₇₅).

The spelling of 2556146 in words is "two million, five hundred fifty-six thousand, one hundred forty-six".