12137429 has 4 divisors (see below), whose sum is σ = 12145260. Its totient is φ = 12129600.

The previous prime is 12137413. The next prime is 12137441. The reversal of 12137429 is 92473121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 6838225 + 5299204 = 2615^2 + 2302^2 .

It is a cyclic number.

It is not a de Polignac number, because 12137429 - 2⁴ = 12137413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12137449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722 + ... + 4979.

It is an arithmetic number, because the mean of its divisors is an integer number (3036315).

Almost surely, 2^12137429 is an apocalyptic number.

It is an amenable number.

12137429 is a deficient number, since it is larger than the sum of its proper divisors (7831).

12137429 is an equidigital number, since it uses as much as digits as its factorization.

12137429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7830.

The product of its digits is 3024, while the sum is 29.

The square root of 12137429 is about 3483.8813125593. The cubic root of 12137429 is about 229.8135161366.

The spelling of 12137429 in words is "twelve million, one hundred thirty-seven thousand, four hundred twenty-nine".