14720391 has 24 divisors (see below), whose sum is σ = 25359360. Its totient is φ = 8045136.

The previous prime is 14720389. The next prime is 14720393. The reversal of 14720391 is 19302741.

14720391 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (14720389) and next prime (14720393).

It is not a de Polignac number, because 14720391 - 2¹ = 14720389 is a prime.

It is a super-2 number, since 2×14720391² = 433379822385762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14720393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3631 + ... + 6528.

It is an arithmetic number, because the mean of its divisors is an integer number (1056640).

Almost surely, 2^14720391 is an apocalyptic number.

14720391 is a deficient number, since it is larger than the sum of its proper divisors (10638969).

14720391 is a wasteful number, since it uses less digits than its factorization.

14720391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10195 (or 10192 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 14720391 is about 3836.7161740217. The cubic root of 14720391 is about 245.0791969428.

The spelling of 14720391 in words is "fourteen million, seven hundred twenty thousand, three hundred ninety-one".