13525281 has 48 divisors (see below), whose sum is σ = 25234560. Its totient is φ = 6773760.

The previous prime is 13525273. The next prime is 13525289. The reversal of 13525281 is 18252531.

It is a happy number.

13525281 is a `hidden beast` number, since 135 + 2 + 528 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (13525273) and next prime (13525289).

It is not a de Polignac number, because 13525281 - 2³ = 13525273 is a prime.

It is a super-2 number, since 2×13525281² = 365866452257922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13525289) 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, 19761 + ... + 20433.

It is an arithmetic number, because the mean of its divisors is an integer number (525720).

Almost surely, 2^13525281 is an apocalyptic number.

13525281 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13525281 is a deficient number, since it is larger than the sum of its proper divisors (11709279).

13525281 is a wasteful number, since it uses less digits than its factorization.

13525281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 723 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 13525281 is about 3677.6733133871. The cubic root of 13525281 is about 238.2586987630.

The spelling of 13525281 in words is "thirteen million, five hundred twenty-five thousand, two hundred eighty-one".