2556746 has 4 divisors (see below), whose sum is σ = 3835122. Its totient is φ = 1278372.

The previous prime is 2556739. The next prime is 2556761. The reversal of 2556746 is 6476552.

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

It can be written as a sum of positive squares in only one way, i.e., 2512225 + 44521 = 1585^2 + 211^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639185 + ... + 639188.

2^2556746 is an apocalyptic number.

2556746 is a deficient number, since it is larger than the sum of its proper divisors (1278376).

2556746 is a wasteful number, since it uses less digits than its factorization.

2556746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1278375.

The product of its digits is 50400, while the sum is 35.

The square root of 2556746 is about 1598.9828016586. The cubic root of 2556746 is about 136.7400900991.

The spelling of 2556746 in words is "two million, five hundred fifty-six thousand, seven hundred forty-six".