257298123 has 4 divisors (see below), whose sum is σ = 343064168. Its totient is φ = 171532080.

The previous prime is 257298113. The next prime is 257298127. The reversal of 257298123 is 321892752.

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

It is not a de Polignac number, because 257298123 - 2¹⁶ = 257232587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257298127) 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, 42883018 + ... + 42883023.

It is an arithmetic number, because the mean of its divisors is an integer number (85766042).

Almost surely, 2^257298123 is an apocalyptic number.

257298123 is a deficient number, since it is larger than the sum of its proper divisors (85766045).

257298123 is an equidigital number, since it uses as much as digits as its factorization.

257298123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85766044.

The product of its digits is 60480, while the sum is 39.

The square root of 257298123 is about 16040.5150478406. The cubic root of 257298123 is about 636.0318627485.

The spelling of 257298123 in words is "two hundred fifty-seven million, two hundred ninety-eight thousand, one hundred twenty-three".