15115842 has 32 divisors (see below), whose sum is σ = 38390400. Its totient is φ = 4318704.

The previous prime is 15115831. The next prime is 15115843. The reversal of 15115842 is 24851151.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (15115843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19617 + ... + 20372.

It is an arithmetic number, because the mean of its divisors is an integer number (1199700).

Almost surely, 2^15115842 is an apocalyptic number.

15115842 is an abundant number, since it is smaller than the sum of its proper divisors (23274558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15115842 is a wasteful number, since it uses less digits than its factorization.

15115842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40007 (or 40001 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The square root of 15115842 is about 3887.9097211741. The cubic root of 15115842 is about 247.2544488412.

Adding to 15115842 its reverse (24851151), we get a palindrome (39966993).

The spelling of 15115842 in words is "fifteen million, one hundred fifteen thousand, eight hundred forty-two".