13520545 has 4 divisors (see below), whose sum is σ = 16224660. Its totient is φ = 10816432.

The previous prime is 13520531. The next prime is 13520579. The reversal of 13520545 is 54502531.

13520545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54502531 = 83 ⋅656657.

It can be written as a sum of positive squares in 2 ways, for example, as 4562496 + 8958049 = 2136^2 + 2993^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520545 - 2⁷ = 13520417 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1352050 + ... + 1352059.

It is an arithmetic number, because the mean of its divisors is an integer number (4056165).

Almost surely, 2^13520545 is an apocalyptic number.

It is an amenable number.

13520545 is a deficient number, since it is larger than the sum of its proper divisors (2704115).

13520545 is an equidigital number, since it uses as much as digits as its factorization.

13520545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2704114.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 13520545 is about 3677.0293716532. The cubic root of 13520545 is about 238.2308860340.

The spelling of 13520545 in words is "thirteen million, five hundred twenty thousand, five hundred forty-five".