123445131 has 16 divisors (see below), whose sum is σ = 173859840. Its totient is φ = 77787360.

The previous prime is 123445123. The next prime is 123445181. The reversal of 123445131 is 131544321.

It is a happy number.

It is not a de Polignac number, because 123445131 - 2³ = 123445123 is a prime.

It is a super-2 number, since 2×123445131² = 30477400735214322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123445121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11436 + ... + 19433.

It is an arithmetic number, because the mean of its divisors is an integer number (10866240).

Almost surely, 2^123445131 is an apocalyptic number.

123445131 is a deficient number, since it is larger than the sum of its proper divisors (50414709).

123445131 is a wasteful number, since it uses less digits than its factorization.

123445131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30946.

The product of its digits is 1440, while the sum is 24.

The square root of 123445131 is about 11110.5864381679. The cubic root of 123445131 is about 497.9181854598.

Adding to 123445131 its reverse (131544321), we get a palindrome (254989452).

The spelling of 123445131 in words is "one hundred twenty-three million, four hundred forty-five thousand, one hundred thirty-one".