13997545 has 8 divisors (see below), whose sum is σ = 17785224. Its totient is φ = 10539264.

The previous prime is 13997539. The next prime is 13997551. The reversal of 13997545 is 54579931.

It is an interprime number because it is at equal distance from previous prime (13997539) and next prime (13997551).

It can be written as a sum of positive squares in 4 ways, for example, as 5517801 + 8479744 = 2349^2 + 2912^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13997545 - 2³ = 13997537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82254 + ... + 82423.

It is an arithmetic number, because the mean of its divisors is an integer number (2223153).

Almost surely, 2^13997545 is an apocalyptic number.

It is an amenable number.

13997545 is a deficient number, since it is larger than the sum of its proper divisors (3787679).

13997545 is a wasteful number, since it uses less digits than its factorization.

13997545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164699.

The product of its digits is 170100, while the sum is 43.

The square root of 13997545 is about 3741.3293092162. The cubic root of 13997545 is about 241.0001377386. Note that the first 3 decimals are identical.

The spelling of 13997545 in words is "thirteen million, nine hundred ninety-seven thousand, five hundred forty-five".