13965945 has 32 divisors (see below), whose sum is σ = 26652672. Its totient is φ = 6105792.

The previous prime is 13965937. The next prime is 13965947. The reversal of 13965945 is 54956931.

It is not a de Polignac number, because 13965945 - 2³ = 13965937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13965897 and 13965906.

It is not an unprimeable number, because it can be changed into a prime (13965947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 477 + ... + 5306.

It is an arithmetic number, because the mean of its divisors is an integer number (832896).

Almost surely, 2^13965945 is an apocalyptic number.

13965945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13965945 is a deficient number, since it is larger than the sum of its proper divisors (12686727).

13965945 is a wasteful number, since it uses less digits than its factorization.

13965945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5821.

The product of its digits is 145800, while the sum is 42.

The square root of 13965945 is about 3737.1038251566. The cubic root of 13965945 is about 240.8186453795.

The spelling of 13965945 in words is "thirteen million, nine hundred sixty-five thousand, nine hundred forty-five".