13955421 has 4 divisors (see below), whose sum is σ = 18607232. Its totient is φ = 9303612.

The previous prime is 13955413. The next prime is 13955423. The reversal of 13955421 is 12455931.

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: 12455931 = 3 ⋅4151977.

It is not a de Polignac number, because 13955421 - 2³ = 13955413 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 (13955423) 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, 2325901 + ... + 2325906.

It is an arithmetic number, because the mean of its divisors is an integer number (4651808).

Almost surely, 2^13955421 is an apocalyptic number.

It is an amenable number.

13955421 is a deficient number, since it is larger than the sum of its proper divisors (4651811).

13955421 is an equidigital number, since it uses as much as digits as its factorization.

13955421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651810.

The product of its digits is 5400, while the sum is 30.

The square root of 13955421 is about 3735.6955175710. The cubic root of 13955421 is about 240.7581407667.

The spelling of 13955421 in words is "thirteen million, nine hundred fifty-five thousand, four hundred twenty-one".