13372421 has 4 divisors (see below), whose sum is σ = 14159052. Its totient is φ = 12585792.

The previous prime is 13372363. The next prime is 13372427. The reversal of 13372421 is 12427331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4669921 + 8702500 = 2161^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 13372421 - 2¹⁸ = 13110277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13372427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393290 + ... + 393323.

It is an arithmetic number, because the mean of its divisors is an integer number (3539763).

Almost surely, 2^13372421 is an apocalyptic number.

It is an amenable number.

13372421 is a deficient number, since it is larger than the sum of its proper divisors (786631).

13372421 is an equidigital number, since it uses as much as digits as its factorization.

13372421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786630.

The product of its digits is 1008, while the sum is 23.

The square root of 13372421 is about 3656.8320989622. The cubic root of 13372421 is about 237.3577120012.

Adding to 13372421 its reverse (12427331), we get a palindrome (25799752).

The spelling of 13372421 in words is "thirteen million, three hundred seventy-two thousand, four hundred twenty-one".