13997121 has 8 divisors (see below), whose sum is σ = 18969024. Its totient is φ = 9178320.

The previous prime is 13997099. The next prime is 13997143. The reversal of 13997121 is 12179931.

It is an interprime number because it is at equal distance from previous prime (13997099) and next prime (13997143).

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

It is not a de Polignac number, because 13997121 - 2⁶ = 13997057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13997821) 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, 38061 + ... + 38426.

It is an arithmetic number, because the mean of its divisors is an integer number (2371128).

Almost surely, 2^13997121 is an apocalyptic number.

It is an amenable number.

13997121 is a deficient number, since it is larger than the sum of its proper divisors (4971903).

13997121 is an equidigital number, since it uses as much as digits as its factorization.

13997121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76551.

The product of its digits is 3402, while the sum is 33.

The square root of 13997121 is about 3741.2726444353. The cubic root of 13997121 is about 240.9977043335.

The spelling of 13997121 in words is "thirteen million, nine hundred ninety-seven thousand, one hundred twenty-one".