256142445 has 32 divisors (see below), whose sum is σ = 446342400. Its totient is φ = 124675584.

The previous prime is 256142441. The next prime is 256142489. The reversal of 256142445 is 544241652.

It is not a de Polignac number, because 256142445 - 2² = 256142441 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256142441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9976 + ... + 24734.

It is an arithmetic number, because the mean of its divisors is an integer number (13948200).

Almost surely, 2^256142445 is an apocalyptic number.

It is an amenable number.

256142445 is a deficient number, since it is larger than the sum of its proper divisors (190199955).

256142445 is a wasteful number, since it uses less digits than its factorization.

256142445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14869.

The product of its digits is 38400, while the sum is 33.

The square root of 256142445 is about 16004.4507872029. The cubic root of 256142445 is about 635.0781684001.

The spelling of 256142445 in words is "two hundred fifty-six million, one hundred forty-two thousand, four hundred forty-five".