13538575 has 6 divisors (see below), whose sum is σ = 16787864. Its totient is φ = 10830840.

The previous prime is 13538573. The next prime is 13538597. The reversal of 13538575 is 57583531.

It is not a de Polignac number, because 13538575 - 2¹ = 13538573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13538573) 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 5 ways as a sum of consecutive naturals, for example, 270747 + ... + 270796.

Almost surely, 2^13538575 is an apocalyptic number.

13538575 is a deficient number, since it is larger than the sum of its proper divisors (3249289).

13538575 is an equidigital number, since it uses as much as digits as its factorization.

13538575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541553 (or 541548 counting only the distinct ones).

The product of its digits is 63000, while the sum is 37.

The square root of 13538575 is about 3679.4802622110. The cubic root of 13538575 is about 238.3367347008.

It can be divided in two parts, 135385 and 75, that added together give a triangular number (135460 = T₅₂₀).

The spelling of 13538575 in words is "thirteen million, five hundred thirty-eight thousand, five hundred seventy-five".