13520273 has 4 divisors (see below), whose sum is σ = 14560308. Its totient is φ = 12480240.

The previous prime is 13520249. The next prime is 13520279. The reversal of 13520273 is 37202531.

13520273 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2715904 + 10804369 = 1648^2 + 3287^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520273 - 2¹² = 13516177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13520279) 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, 519998 + ... + 520023.

It is an arithmetic number, because the mean of its divisors is an integer number (3640077).

Almost surely, 2^13520273 is an apocalyptic number.

13520273 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13520273 is a deficient number, since it is larger than the sum of its proper divisors (1040035).

13520273 is a wasteful number, since it uses less digits than its factorization.

13520273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1040034.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 13520273 is about 3676.9923850887. The cubic root of 13520273 is about 238.2292884841.

The spelling of 13520273 in words is "thirteen million, five hundred twenty thousand, two hundred seventy-three".