123256986 has 8 divisors (see below), whose sum is σ = 246513984. Its totient is φ = 41085660.

The previous prime is 123256937. The next prime is 123257003. The reversal of 123256986 is 689652321.

It is a sphenic number, since it is the product of 3 distinct primes.

123256986 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10271410 + ... + 10271421.

It is an arithmetic number, because the mean of its divisors is an integer number (30814248).

Almost surely, 2^123256986 is an apocalyptic number.

123256986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123256986 is a wasteful number, since it uses less digits than its factorization.

123256986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20542836.

The product of its digits is 155520, while the sum is 42.

The square root of 123256986 is about 11102.1162847450. The cubic root of 123256986 is about 497.6650947407.

The spelling of 123256986 in words is "one hundred twenty-three million, two hundred fifty-six thousand, nine hundred eighty-six".