257056043 has 4 divisors (see below), whose sum is σ = 257201520. Its totient is φ = 256910568.

The previous prime is 257056003. The next prime is 257056049. The reversal of 257056043 is 340650752.

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

It is a cyclic number.

It is not a de Polignac number, because 257056043 - 2⁸ = 257055787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257056049) 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, 70055 + ... + 73632.

It is an arithmetic number, because the mean of its divisors is an integer number (64300380).

Almost surely, 2^257056043 is an apocalyptic number.

257056043 is a deficient number, since it is larger than the sum of its proper divisors (145477).

257056043 is a wasteful number, since it uses less digits than its factorization.

257056043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145476.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 257056043 is about 16032.9673797460. The cubic root of 257056043 is about 635.8323290911.

The spelling of 257056043 in words is "two hundred fifty-seven million, fifty-six thousand, forty-three".