13525537 has 4 divisors (see below), whose sum is σ = 13534020. Its totient is φ = 13517056.

The previous prime is 13525529. The next prime is 13525543. The reversal of 13525537 is 73552531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 73552531 = 13 ⋅5657887.

It can be written as a sum of positive squares in 2 ways, for example, as 4769856 + 8755681 = 2184^2 + 2959^2 .

It is a cyclic number.

It is not a de Polignac number, because 13525537 - 2³ = 13525529 is a prime.

It is a super-2 number, since 2×13525537² = 365880302276738, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 13525499 and 13525508.

It is not an unprimeable number, because it can be changed into a prime (13525937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048 + ... + 5305.

It is an arithmetic number, because the mean of its divisors is an integer number (3383505).

Almost surely, 2^13525537 is an apocalyptic number.

It is an amenable number.

13525537 is a deficient number, since it is larger than the sum of its proper divisors (8483).

13525537 is an equidigital number, since it uses as much as digits as its factorization.

13525537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8482.

The product of its digits is 15750, while the sum is 31.

The square root of 13525537 is about 3677.7081178364. The cubic root of 13525537 is about 238.2602019688.

It can be divided in two parts, 1352 and 5537, that added together give a square (6889 = 83²).

The spelling of 13525537 in words is "thirteen million, five hundred twenty-five thousand, five hundred thirty-seven".