123631842 has 16 divisors (see below), whose sum is σ = 247373280. Its totient is φ = 41192352.

The previous prime is 123631819. The next prime is 123631853. The reversal of 123631842 is 248136321.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21909 + ... + 26967.

It is an arithmetic number, because the mean of its divisors is an integer number (15460830).

Almost surely, 2^123631842 is an apocalyptic number.

123631842 is an abundant number, since it is smaller than the sum of its proper divisors (123741438).

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

123631842 is a wasteful number, since it uses less digits than its factorization.

123631842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9137.

The product of its digits is 6912, while the sum is 30.

The square root of 123631842 is about 11118.9856551756. The cubic root of 123631842 is about 498.1690930765.

The spelling of 123631842 in words is "one hundred twenty-three million, six hundred thirty-one thousand, eight hundred forty-two".