256242154 has 16 divisors (see below), whose sum is σ = 442224000. Its totient is φ = 109080144.

The previous prime is 256242083. The next prime is 256242163. The reversal of 256242154 is 451242652.

It is an unprimeable number.

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, 59334 + ... + 63505.

It is an arithmetic number, because the mean of its divisors is an integer number (27639000).

Almost surely, 2^256242154 is an apocalyptic number.

256242154 is a deficient number, since it is larger than the sum of its proper divisors (185981846).

256242154 is a wasteful number, since it uses less digits than its factorization.

256242154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122997.

The product of its digits is 19200, while the sum is 31.

The square root of 256242154 is about 16007.5655238390. The cubic root of 256242154 is about 635.1605636916.

The spelling of 256242154 in words is "two hundred fifty-six million, two hundred forty-two thousand, one hundred fifty-four".