15421413 has 16 divisors (see below), whose sum is σ = 23832576. Its totient is φ = 8687280.

The previous prime is 15421411. The next prime is 15421423. The reversal of 15421413 is 31412451.

It is not a de Polignac number, because 15421413 - 2¹ = 15421411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 15421413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15421411) 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, 3681 + ... + 6662.

It is an arithmetic number, because the mean of its divisors is an integer number (1489536).

Almost surely, 2^15421413 is an apocalyptic number.

It is an amenable number.

15421413 is a deficient number, since it is larger than the sum of its proper divisors (8411163).

15421413 is a wasteful number, since it uses less digits than its factorization.

15421413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10424.

The product of its digits is 480, while the sum is 21.

The square root of 15421413 is about 3927.0106951726. The cubic root of 15421413 is about 248.9094524077.

Adding to 15421413 its reverse (31412451), we get a palindrome (46833864).

The spelling of 15421413 in words is "fifteen million, four hundred twenty-one thousand, four hundred thirteen".