123140031 has 8 divisors (see below), whose sum is σ = 187641984. Its totient is φ = 70365720.

The previous prime is 123140011. The next prime is 123140063. The reversal of 123140031 is 130041321.

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

It is not a de Polignac number, because 123140031 - 2¹⁵ = 123107263 is a prime.

It is a super-2 number, since 2×123140031² = 30326934469361922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123140011) 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, 2931885 + ... + 2931926.

It is an arithmetic number, because the mean of its divisors is an integer number (23455248).

Almost surely, 2^123140031 is an apocalyptic number.

123140031 is a deficient number, since it is larger than the sum of its proper divisors (64501953).

123140031 is an equidigital number, since it uses as much as digits as its factorization.

123140031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5863821.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123140031 is about 11096.8477956580. The cubic root of 123140031 is about 497.5076382420.

Adding to 123140031 its reverse (130041321), we get a palindrome (253181352).

The spelling of 123140031 in words is "one hundred twenty-three million, one hundred forty thousand, thirty-one".