13138421 has 8 divisors (see below), whose sum is σ = 13672800. Its totient is φ = 12609520.

The previous prime is 13138403. The next prime is 13138439. The reversal of 13138421 is 12483131.

It is an interprime number because it is at equal distance from previous prime (13138403) and next prime (13138439).

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 13138421 - 2⁶ = 13138357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13138471) 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, 3926 + ... + 6456.

It is an arithmetic number, because the mean of its divisors is an integer number (1709100).

Almost surely, 2^13138421 is an apocalyptic number.

It is an amenable number.

13138421 is a deficient number, since it is larger than the sum of its proper divisors (534379).

13138421 is a wasteful number, since it uses less digits than its factorization.

13138421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2739.

The product of its digits is 576, while the sum is 23.

The square root of 13138421 is about 3624.6959872519. The cubic root of 13138421 is about 235.9650731133.

The spelling of 13138421 in words is "thirteen million, one hundred thirty-eight thousand, four hundred twenty-one".