123135432 has 48 divisors (see below), whose sum is σ = 358101360. Its totient is φ = 35181216.

The previous prime is 123135431. The next prime is 123135443. The reversal of 123135432 is 234531321.

It is a super-2 number, since 2×123135432² = 30324669227653248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (123135431) 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, 51178 + ... + 53529.

It is an arithmetic number, because the mean of its divisors is an integer number (7460445).

Almost surely, 2^123135432 is an apocalyptic number.

123135432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123135432 is an abundant number, since it is smaller than the sum of its proper divisors (234965928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123135432 is a wasteful number, since it uses less digits than its factorization.

123135432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104730 (or 104719 counting only the distinct ones).

The product of its digits is 2160, while the sum is 24.

The square root of 123135432 is about 11096.6405727139. The cubic root of 123135432 is about 497.5014445721.

Adding to 123135432 its reverse (234531321), we get a palindrome (357666753).

It can be divided in two parts, 1231 and 35432, that added together give a palindrome (36663).

The spelling of 123135432 in words is "one hundred twenty-three million, one hundred thirty-five thousand, four hundred thirty-two".