2556958 has 4 divisors (see below), whose sum is σ = 3835440. Its totient is φ = 1278478.

The previous prime is 2556943. The next prime is 2556977. The reversal of 2556958 is 8596552.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 2556958.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639238 + ... + 639241.

It is an arithmetic number, because the mean of its divisors is an integer number (958860).

2^2556958 is an apocalyptic number.

2556958 is a deficient number, since it is larger than the sum of its proper divisors (1278482).

2556958 is a wasteful number, since it uses less digits than its factorization.

2556958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278481.

The product of its digits is 108000, while the sum is 40.

The square root of 2556958 is about 1599.0490924296. The cubic root of 2556958 is about 136.7438693949.

The spelling of 2556958 in words is "two million, five hundred fifty-six thousand, nine hundred fifty-eight".