13455939 has 24 divisors (see below), whose sum is σ = 21012480. Its totient is φ = 7636944.

The previous prime is 13455931. The next prime is 13455979. The reversal of 13455939 is 93955431.

It is not a de Polignac number, because 13455939 - 2³ = 13455931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13455897 and 13455906.

It is not an unprimeable number, because it can be changed into a prime (13455931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34942 + ... + 35324.

It is an arithmetic number, because the mean of its divisors is an integer number (875520).

Almost surely, 2^13455939 is an apocalyptic number.

13455939 is a deficient number, since it is larger than the sum of its proper divisors (7556541).

13455939 is a wasteful number, since it uses less digits than its factorization.

13455939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 632 counting only the distinct ones).

The product of its digits is 72900, while the sum is 39.

The square root of 13455939 is about 3668.2337711765. The cubic root of 13455939 is about 237.8508292461.

The spelling of 13455939 in words is "thirteen million, four hundred fifty-five thousand, nine hundred thirty-nine".