123731042 has 8 divisors (see below), whose sum is σ = 185970000. Its totient is φ = 61741044.

The previous prime is 123730987. The next prime is 123731051. The reversal of 123731042 is 240137321.

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

It is a junction number, because it is equal to n+sod(n) for n = 123730999 and 123731017.

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, 60992 + ... + 62987.

It is an arithmetic number, because the mean of its divisors is an integer number (23246250).

Almost surely, 2^123731042 is an apocalyptic number.

123731042 is a deficient number, since it is larger than the sum of its proper divisors (62238958).

123731042 is a wasteful number, since it uses less digits than its factorization.

123731042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124480.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 123731042 is about 11123.4455992736. The cubic root of 123731042 is about 498.3022981409.

Adding to 123731042 its reverse (240137321), we get a palindrome (363868363).

The spelling of 123731042 in words is "one hundred twenty-three million, seven hundred thirty-one thousand, forty-two".