13958421 has 4 divisors (see below), whose sum is σ = 18611232. Its totient is φ = 9305612.

The previous prime is 13958419. The next prime is 13958423. The reversal of 13958421 is 12485931.

13958421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 an emirpimes, since its reverse is a distinct semiprime: 12485931 = 3 ⋅4161977.

It is an interprime number because it is at equal distance from previous prime (13958419) and next prime (13958423).

It is a cyclic number.

It is not a de Polignac number, because 13958421 - 2¹ = 13958419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13958423) 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, 2326401 + ... + 2326406.

It is an arithmetic number, because the mean of its divisors is an integer number (4652808).

Almost surely, 2^13958421 is an apocalyptic number.

It is an amenable number.

13958421 is a deficient number, since it is larger than the sum of its proper divisors (4652811).

13958421 is an equidigital number, since it uses as much as digits as its factorization.

13958421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652810.

The product of its digits is 8640, while the sum is 33.

The square root of 13958421 is about 3736.0970276480. The cubic root of 13958421 is about 240.7753914746.

The spelling of 13958421 in words is "thirteen million, nine hundred fifty-eight thousand, four hundred twenty-one".