123402231 has 8 divisors (see below), whose sum is σ = 182818160. Its totient is φ = 82268136.

The previous prime is 123402229. The next prime is 123402233. The reversal of 123402231 is 132204321.

It is an interprime number because it is at equal distance from previous prime (123402229) and next prime (123402233).

It is not a de Polignac number, because 123402231 - 2¹ = 123402229 is a prime.

It is a super-2 number, since 2×123402231² = 30456221231554722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123402233) 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, 2285200 + ... + 2285253.

It is an arithmetic number, because the mean of its divisors is an integer number (22852270).

Almost surely, 2^123402231 is an apocalyptic number.

123402231 is a deficient number, since it is larger than the sum of its proper divisors (59415929).

123402231 is an equidigital number, since it uses as much as digits as its factorization.

123402231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4570462 (or 4570456 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 123402231 is about 11108.6556792440. The cubic root of 123402231 is about 497.8604994662.

Adding to 123402231 its reverse (132204321), we get a palindrome (255606552).

The spelling of 123402231 in words is "one hundred twenty-three million, four hundred two thousand, two hundred thirty-one".