13000421 has 4 divisors (see below), whose sum is σ = 14857632. Its totient is φ = 11143212.

The previous prime is 13000411. The next prime is 13000457. The reversal of 13000421 is 12400031.

It is a happy number.

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 13000421 - 2¹⁰ = 12999397 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 (13000411) 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, 928595 + ... + 928608.

It is an arithmetic number, because the mean of its divisors is an integer number (3714408).

Almost surely, 2^13000421 is an apocalyptic number.

It is an amenable number.

13000421 is a deficient number, since it is larger than the sum of its proper divisors (1857211).

13000421 is an equidigital number, since it uses as much as digits as its factorization.

13000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1857210.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 13000421 is about 3605.6096571870. The cubic root of 13000421 is about 235.1360069803.

Adding to 13000421 its reverse (12400031), we get a palindrome (25400452).

The spelling of 13000421 in words is "thirteen million, four hundred twenty-one", and thus it is an aban number.