12513421 has 8 divisors (see below), whose sum is σ = 12829824. Its totient is φ = 12199200.

The previous prime is 12513409. The next prime is 12513433. The reversal of 12513421 is 12431521.

It is an interprime number because it is at equal distance from previous prime (12513409) and next prime (12513433).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12513421 - 2²¹ = 10416269 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 (12513401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20521 + ... + 21121.

It is an arithmetic number, because the mean of its divisors is an integer number (1603728).

Almost surely, 2^12513421 is an apocalyptic number.

It is an amenable number.

12513421 is a deficient number, since it is larger than the sum of its proper divisors (316403).

12513421 is an equidigital number, since it uses as much as digits as its factorization.

12513421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091.

The product of its digits is 240, while the sum is 19.

The square root of 12513421 is about 3537.4314127627. The cubic root of 12513421 is about 232.1624716568.

Adding to 12513421 its reverse (12431521), we get a palindrome (24944942).

The spelling of 12513421 in words is "twelve million, five hundred thirteen thousand, four hundred twenty-one".