15421201 has 4 divisors (see below), whose sum is σ = 16091712. Its totient is φ = 14750692.

The previous prime is 15421199. The next prime is 15421213. The reversal of 15421201 is 10212451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15421201 - 2¹ = 15421199 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15421001) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 335221 + ... + 335266.

It is an arithmetic number, because the mean of its divisors is an integer number (4022928).

Almost surely, 2^15421201 is an apocalyptic number.

It is an amenable number.

15421201 is a deficient number, since it is larger than the sum of its proper divisors (670511).

15421201 is an equidigital number, since it uses as much as digits as its factorization.

15421201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670510.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 15421201 is about 3926.9837025381. The cubic root of 15421201 is about 248.9083118065.

Adding to 15421201 its reverse (10212451), we get a palindrome (25633652).

The spelling of 15421201 in words is "fifteen million, four hundred twenty-one thousand, two hundred one".