13581975 has 48 divisors (see below), whose sum is σ = 24891264. Its totient is φ = 6480000.

The previous prime is 13581973. The next prime is 13581991. The reversal of 13581975 is 57918531.

It is not a de Polignac number, because 13581975 - 2¹ = 13581973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13581973) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 83244 + ... + 83406.

It is an arithmetic number, because the mean of its divisors is an integer number (518568).

Almost surely, 2^13581975 is an apocalyptic number.

13581975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13581975 is a deficient number, since it is larger than the sum of its proper divisors (11309289).

13581975 is a wasteful number, since it uses less digits than its factorization.

13581975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 283 counting only the distinct ones).

The product of its digits is 37800, while the sum is 39.

The square root of 13581975 is about 3685.3731154389. The cubic root of 13581975 is about 238.5911381622.

It can be divided in two parts, 1358 and 1975, that added together give a palindrome (3333).

The spelling of 13581975 in words is "thirteen million, five hundred eighty-one thousand, nine hundred seventy-five".