256416542 has 16 divisors (see below), whose sum is σ = 417184992. Its totient is φ = 117722880.

The previous prime is 256416527. The next prime is 256416547. The reversal of 256416542 is 245614652.

It is a super-2 number, since 2×256416542² = 131498886022475528, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256416547) 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, 90578 + ... + 93365.

It is an arithmetic number, because the mean of its divisors is an integer number (26074062).

Almost surely, 2^256416542 is an apocalyptic number.

256416542 is a deficient number, since it is larger than the sum of its proper divisors (160768450).

256416542 is a wasteful number, since it uses less digits than its factorization.

256416542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184003.

The product of its digits is 57600, while the sum is 35.

The square root of 256416542 is about 16013.0116467828. The cubic root of 256416542 is about 635.3046191757.

The spelling of 256416542 in words is "two hundred fifty-six million, four hundred sixteen thousand, five hundred forty-two".