15981042 has 32 divisors (see below), whose sum is σ = 39849984. Its totient is φ = 4150800.

The previous prime is 15981023. The next prime is 15981047. The reversal of 15981042 is 24018951.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (15981047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16834 + ... + 17757.

It is an arithmetic number, because the mean of its divisors is an integer number (1245312).

Almost surely, 2^15981042 is an apocalyptic number.

15981042 is an abundant number, since it is smaller than the sum of its proper divisors (23868942).

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

15981042 is a wasteful number, since it uses less digits than its factorization.

15981042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34614.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 15981042 is about 3997.6295476194. The cubic root of 15981042 is about 251.8846473819.

Adding to 15981042 its reverse (24018951), we get a palindrome (39999993).

The spelling of 15981042 in words is "fifteen million, nine hundred eighty-one thousand, forty-two".