123256671 has 8 divisors (see below), whose sum is σ = 165797040. Its totient is φ = 81443712.

The previous prime is 123256597. The next prime is 123256691. The reversal of 123256671 is 176652321.

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

It is not a de Polignac number, because 123256671 - 2¹¹ = 123254623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123256691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181456 + ... + 182133.

It is an arithmetic number, because the mean of its divisors is an integer number (20724630).

Almost surely, 2^123256671 is an apocalyptic number.

123256671 is a deficient number, since it is larger than the sum of its proper divisors (42540369).

123256671 is a wasteful number, since it uses less digits than its factorization.

123256671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363705.

The product of its digits is 15120, while the sum is 33.

The square root of 123256671 is about 11102.1020982515. The cubic root of 123256671 is about 497.6646707901.

The spelling of 123256671 in words is "one hundred twenty-three million, two hundred fifty-six thousand, six hundred seventy-one".