15448139 has 4 divisors (see below), whose sum is σ = 17655024. Its totient is φ = 13241256.

The previous prime is 15448073. The next prime is 15448163. The reversal of 15448139 is 93184451.

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

It is not a de Polignac number, because 15448139 - 2¹² = 15444043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 15448099 and 15448108.

It is not an unprimeable number, because it can be changed into a prime (15448439) 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, 1103432 + ... + 1103445.

It is an arithmetic number, because the mean of its divisors is an integer number (4413756).

Almost surely, 2^15448139 is an apocalyptic number.

15448139 is a deficient number, since it is larger than the sum of its proper divisors (2206885).

15448139 is an equidigital number, since it uses as much as digits as its factorization.

15448139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2206884.

The product of its digits is 17280, while the sum is 35.

The square root of 15448139 is about 3930.4120649113. The cubic root of 15448139 is about 249.0531598353.

The spelling of 15448139 in words is "fifteen million, four hundred forty-eight thousand, one hundred thirty-nine".