15712139 has 4 divisors (see below), whose sum is σ = 15722856. Its totient is φ = 15701424.

The previous prime is 15712127. The next prime is 15712153. The reversal of 15712139 is 93121751.

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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15712139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15712159) 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, 2729 + ... + 6234.

It is an arithmetic number, because the mean of its divisors is an integer number (3930714).

Almost surely, 2^15712139 is an apocalyptic number.

15712139 is a deficient number, since it is larger than the sum of its proper divisors (10717).

15712139 is an equidigital number, since it uses as much as digits as its factorization.

15712139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10716.

The product of its digits is 1890, while the sum is 29.

The square root of 15712139 is about 3963.8540588675. The cubic root of 15712139 is about 250.4638800621.

It can be divided in two parts, 15712 and 139, that added together give a palindrome (15851).

The spelling of 15712139 in words is "fifteen million, seven hundred twelve thousand, one hundred thirty-nine".