15421104 has 100 divisors (see below), whose sum is σ = 45522136. Its totient is φ = 5038848.

The previous prime is 15421093. The next prime is 15421111. The reversal of 15421104 is 40112451.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94527 + ... + 94689.

Almost surely, 2^15421104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 15421104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22761068).

15421104 is an abundant number, since it is smaller than the sum of its proper divisors (30101032).

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

15421104 is a wasteful number, since it uses less digits than its factorization.

15421104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 15421104 is about 3926.9713520727. The cubic root of 15421104 is about 248.9077899242.

Adding to 15421104 its reverse (40112451), we get a palindrome (55533555).

The spelling of 15421104 in words is "fifteen million, four hundred twenty-one thousand, one hundred four".