13997745 has 16 divisors (see below), whose sum is σ = 24885120. Its totient is φ = 7465392.

The previous prime is 13997741. The next prime is 13997759. The reversal of 13997745 is 54779931.

It is not a de Polignac number, because 13997745 - 2² = 13997741 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 13997745.

It is not an unprimeable number, because it can be changed into a prime (13997741) 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 15 ways as a sum of consecutive naturals, for example, 51709 + ... + 51978.

It is an arithmetic number, because the mean of its divisors is an integer number (1555320).

Almost surely, 2^13997745 is an apocalyptic number.

13997745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13997745 is a deficient number, since it is larger than the sum of its proper divisors (10887375).

13997745 is a wasteful number, since it uses less digits than its factorization.

13997745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103701 (or 103695 counting only the distinct ones).

The product of its digits is 238140, while the sum is 45.

The square root of 13997745 is about 3741.3560375885. The cubic root of 13997745 is about 241.0012855541.

The spelling of 13997745 in words is "thirteen million, nine hundred ninety-seven thousand, seven hundred forty-five".