15630139 has 8 divisors (see below), whose sum is σ = 17906400. Its totient is φ = 13364736.

The previous prime is 15630127. The next prime is 15630149. The reversal of 15630139 is 93103651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 15630139 - 2¹¹ = 15628091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15630119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657 + ... + 5629.

It is an arithmetic number, because the mean of its divisors is an integer number (2238300).

Almost surely, 2^15630139 is an apocalyptic number.

15630139 is a deficient number, since it is larger than the sum of its proper divisors (2276261).

15630139 is an equidigital number, since it uses as much as digits as its factorization.

15630139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5429.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 15630139 is about 3953.4970595664. The cubic root of 15630139 is about 250.0274049958.

It can be divided in two parts, 15630 and 139, that multiplied together give a triangular number (2172570 = T₂₀₈₄).

The spelling of 15630139 in words is "fifteen million, six hundred thirty thousand, one hundred thirty-nine".