123431 has 12 divisors (see below), whose sum is σ = 157320. Its totient is φ = 95760.

The previous prime is 123427. The next prime is 123433. The reversal of 123431 is 134321.

It is not a de Polignac number, because 123431 - 2² = 123427 is a prime.

It is a super-2 number, since 2×123431² = 30470423522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123433) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 425 + ... + 653.

It is an arithmetic number, because the mean of its divisors is an integer number (13110).

2¹²³⁴³¹ is an apocalyptic number.

123431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

123431 is a deficient number, since it is larger than the sum of its proper divisors (33889).

123431 is a wasteful number, since it uses less digits than its factorization.

123431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 247 counting only the distinct ones).

The product of its digits is 72, while the sum is 14.

The square root of 123431 is about 351.3274825572. The cubic root of 123431 is about 49.7899185519.

Adding to 123431 its reverse (134321), we get a palindrome (257752).

It can be divided in two parts, 12 and 3431, that added together give a palindrome (3443).

The spelling of 123431 in words is "one hundred twenty-three thousand, four hundred thirty-one".