13960921 has 6 divisors (see below), whose sum is σ = 15117630. Its totient is φ = 12886848.

The previous prime is 13960909. The next prime is 13960937. The reversal of 13960921 is 12906931.

13960921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 921600 + 13039321 = 960^2 + 3611^2 .

It is not a de Polignac number, because 13960921 - 2⁹ = 13960409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13960901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41136 + ... + 41473.

It is an arithmetic number, because the mean of its divisors is an integer number (2519605).

Almost surely, 2^13960921 is an apocalyptic number.

It is an amenable number.

13960921 is a deficient number, since it is larger than the sum of its proper divisors (1156709).

13960921 is an equidigital number, since it uses as much as digits as its factorization.

13960921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82635 (or 82622 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 13960921 is about 3736.4315864204. The cubic root of 13960921 is about 240.7897651765.

The spelling of 13960921 in words is "thirteen million, nine hundred sixty thousand, nine hundred twenty-one".