13981345 has 16 divisors (see below), whose sum is σ = 19289088. Its totient is φ = 9529920.

The previous prime is 13981339. The next prime is 13981349. The reversal of 13981345 is 54318931.

13981345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13981345 - 2³ = 13981337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13981345.

It is not an unprimeable number, because it can be changed into a prime (13981349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5232 + ... + 7438.

It is an arithmetic number, because the mean of its divisors is an integer number (1205568).

Almost surely, 2^13981345 is an apocalyptic number.

It is an amenable number.

13981345 is a deficient number, since it is larger than the sum of its proper divisors (5307743).

13981345 is a wasteful number, since it uses less digits than its factorization.

13981345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2400.

The product of its digits is 12960, while the sum is 34.

The square root of 13981345 is about 3739.1636765459. The cubic root of 13981345 is about 240.9071283485.

The spelling of 13981345 in words is "thirteen million, nine hundred eighty-one thousand, three hundred forty-five".