2556722 has 16 divisors (see below), whose sum is σ = 4473600. Its totient is φ = 1095444.

The previous prime is 2556713. The next prime is 2556739. The reversal of 2556722 is 2276552.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178 + ... + 2549.

It is an arithmetic number, because the mean of its divisors is an integer number (279600).

2^2556722 is an apocalyptic number.

2556722 is a deficient number, since it is larger than the sum of its proper divisors (1916878).

2556722 is an equidigital number, since it uses as much as digits as its factorization.

2556722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3750 (or 3736 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 2556722 is about 1598.9752968698. The cubic root of 2556722 is about 136.7396622411.

The spelling of 2556722 in words is "two million, five hundred fifty-six thousand, seven hundred twenty-two".