12429131 has 16 divisors (see below), whose sum is σ = 15240960. Its totient is φ = 9973920.

The previous prime is 12429127. The next prime is 12429143. The reversal of 12429131 is 13192421.

It is not a de Polignac number, because 12429131 - 2² = 12429127 is a prime.

It is a super-2 number, since 2×12429131² = 308966594830322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12429097 and 12429106.

It is not an unprimeable number, because it can be changed into a prime (12429121) 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, 1400 + ... + 5178.

It is an arithmetic number, because the mean of its divisors is an integer number (952560).

Almost surely, 2^12429131 is an apocalyptic number.

12429131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12429131 is a deficient number, since it is larger than the sum of its proper divisors (2811829).

12429131 is a wasteful number, since it uses less digits than its factorization.

12429131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3826.

The product of its digits is 432, while the sum is 23.

The square root of 12429131 is about 3525.4972698897. The cubic root of 12429131 is about 231.6400171773.

The spelling of 12429131 in words is "twelve million, four hundred twenty-nine thousand, one hundred thirty-one".