256072141 has 4 divisors (see below), whose sum is σ = 275770012. Its totient is φ = 236374272.

The previous prime is 256072127. The next prime is 256072147. The reversal of 256072141 is 141270652.

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

It can be written as a sum of positive squares in 2 ways, for example, as 88266025 + 167806116 = 9395^2 + 12954^2 .

It is a cyclic number.

It is not a de Polignac number, because 256072141 - 2⁵ = 256072109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256072147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9848916 + ... + 9848941.

It is an arithmetic number, because the mean of its divisors is an integer number (68942503).

Almost surely, 2^256072141 is an apocalyptic number.

It is an amenable number.

256072141 is a deficient number, since it is larger than the sum of its proper divisors (19697871).

256072141 is a wasteful number, since it uses less digits than its factorization.

256072141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19697870.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 256072141 is about 16002.2542474490. The cubic root of 256072141 is about 635.0200592998.

The spelling of 256072141 in words is "two hundred fifty-six million, seventy-two thousand, one hundred forty-one".