12429261 has 32 divisors (see below), whose sum is σ = 21006720. Its totient is φ = 7195392.

The previous prime is 12429259. The next prime is 12429283. The reversal of 12429261 is 16292421.

It is not a de Polignac number, because 12429261 - 2¹ = 12429259 is a prime.

It is a super-2 number, since 2×12429261² = 308973058012242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12429061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4926 + ... + 7008.

It is an arithmetic number, because the mean of its divisors is an integer number (656460).

Almost surely, 2^12429261 is an apocalyptic number.

It is an amenable number.

12429261 is a deficient number, since it is larger than the sum of its proper divisors (8577459).

12429261 is a wasteful number, since it uses less digits than its factorization.

12429261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122 (or 2116 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 12429261 is about 3525.5157069569. The cubic root of 12429261 is about 231.6408247719.

The spelling of 12429261 in words is "twelve million, four hundred twenty-nine thousand, two hundred sixty-one".