12144139 has 16 divisors (see below), whose sum is σ = 14247360. Its totient is φ = 10137600.

The previous prime is 12144131. The next prime is 12144151. The reversal of 12144139 is 93144121.

It is a happy number.

12144139 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12144139 - 2³ = 12144131 is a prime.

It is a super-2 number, since 2×12144139² = 294960224102642, which contains 22 as substring.

It is a Duffinian number.

12144139 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (12144131) 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, 62827 + ... + 63019.

It is an arithmetic number, because the mean of its divisors is an integer number (890460).

Almost surely, 2^12144139 is an apocalyptic number.

12144139 is a deficient number, since it is larger than the sum of its proper divisors (2103221).

12144139 is a wasteful number, since it uses less digits than its factorization.

12144139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390.

The product of its digits is 864, while the sum is 25.

The square root of 12144139 is about 3484.8441858999. The cubic root of 12144139 is about 229.8558580147.

The spelling of 12144139 in words is "twelve million, one hundred forty-four thousand, one hundred thirty-nine".