123315861 has 8 divisors (see below), whose sum is σ = 169725184. Its totient is φ = 79558560.

The previous prime is 123315821. The next prime is 123315869. The reversal of 123315861 is 168513321.

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

It is not a de Polignac number, because 123315861 - 2¹⁸ = 123053717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123315869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662896 + ... + 663081.

It is an arithmetic number, because the mean of its divisors is an integer number (21215648).

Almost surely, 2^123315861 is an apocalyptic number.

It is an amenable number.

123315861 is a deficient number, since it is larger than the sum of its proper divisors (46409323).

123315861 is a wasteful number, since it uses less digits than its factorization.

123315861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326011.

The product of its digits is 4320, while the sum is 30.

The square root of 123315861 is about 11104.7674896866. The cubic root of 123315861 is about 497.7443204557.

The spelling of 123315861 in words is "one hundred twenty-three million, three hundred fifteen thousand, eight hundred sixty-one".