256623542 has 16 divisors (see below), whose sum is σ = 440132352. Its totient is φ = 109929960.

The previous prime is 256623533. The next prime is 256623547. The reversal of 256623542 is 245326652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256623547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52703 + ... + 57365.

It is an arithmetic number, because the mean of its divisors is an integer number (27508272).

Almost surely, 2^256623542 is an apocalyptic number.

256623542 is a deficient number, since it is larger than the sum of its proper divisors (183508810).

256623542 is a wasteful number, since it uses less digits than its factorization.

256623542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8603.

The product of its digits is 86400, while the sum is 35.

The square root of 256623542 is about 16019.4738365528. The cubic root of 256623542 is about 635.4755294753.

The spelling of 256623542 in words is "two hundred fifty-six million, six hundred twenty-three thousand, five hundred forty-two".