12451139 has 4 divisors (see below), whose sum is σ = 12488424. Its totient is φ = 12413856.

The previous prime is 12451097. The next prime is 12451141. The reversal of 12451139 is 93115421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12451139 - 2⁸ = 12450883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12451169) 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, 18137 + ... + 18810.

It is an arithmetic number, because the mean of its divisors is an integer number (3122106).

Almost surely, 2^12451139 is an apocalyptic number.

12451139 is a deficient number, since it is larger than the sum of its proper divisors (37285).

12451139 is an equidigital number, since it uses as much as digits as its factorization.

12451139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37284.

The product of its digits is 1080, while the sum is 26.

The square root of 12451139 is about 3528.6171512364. The cubic root of 12451139 is about 231.7766565911.

The spelling of 12451139 in words is "twelve million, four hundred fifty-one thousand, one hundred thirty-nine".