123256971 has 30 divisors (see below), whose sum is σ = 194502660. Its totient is φ = 77571432.

The previous prime is 123256937. The next prime is 123257003. The reversal of 123256971 is 179652321.

123256971 is a `hidden beast` number, since 1 + 23 + 2 + 569 + 71 = 666.

It is not a de Polignac number, because 123256971 - 2⁷ = 123256843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123256271) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 435396 + ... + 435678.

It is an arithmetic number, because the mean of its divisors is an integer number (6483422).

Almost surely, 2^123256971 is an apocalyptic number.

123256971 is a deficient number, since it is larger than the sum of its proper divisors (71245689).

123256971 is an frugal number, since it uses more digits than its factorization.

123256971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 305 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 123256971 is about 11102.1156091981. The cubic root of 123256971 is about 497.6650745526.

The spelling of 123256971 in words is "one hundred twenty-three million, two hundred fifty-six thousand, nine hundred seventy-one".