13597421 has 4 divisors (see below), whose sum is σ = 13605312. Its totient is φ = 13589532.

The previous prime is 13597411. The next prime is 13597457. The reversal of 13597421 is 12479531.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13597421 - 2⁶ = 13597357 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 (13597411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131 + ... + 5216.

It is an arithmetic number, because the mean of its divisors is an integer number (3401328).

Almost surely, 2^13597421 is an apocalyptic number.

It is an amenable number.

13597421 is a deficient number, since it is larger than the sum of its proper divisors (7891).

13597421 is an equidigital number, since it uses as much as digits as its factorization.

13597421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7890.

The product of its digits is 7560, while the sum is 32.

The square root of 13597421 is about 3687.4681015569. The cubic root of 13597421 is about 238.6815492299.

The spelling of 13597421 in words is "thirteen million, five hundred ninety-seven thousand, four hundred twenty-one".