14397921 has 12 divisors (see below), whose sum is σ = 21359572. Its totient is φ = 9338976.

The previous prime is 14397899. The next prime is 14397923. The reversal of 14397921 is 12979341.

It can be written as a sum of positive squares in 2 ways, for example, as 6051600 + 8346321 = 2460^2 + 2889^2 .

It is not a de Polignac number, because 14397921 - 2¹⁹ = 13873633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14397923) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21286 + ... + 21951.

Almost surely, 2^14397921 is an apocalyptic number.

It is an amenable number.

14397921 is a deficient number, since it is larger than the sum of its proper divisors (6961651).

14397921 is a wasteful number, since it uses less digits than its factorization.

14397921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43280 (or 43277 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 14397921 is about 3794.4592500118. The cubic root of 14397921 is about 243.2763710206.

The spelling of 14397921 in words is "fourteen million, three hundred ninety-seven thousand, nine hundred twenty-one".