13520345 has 16 divisors (see below), whose sum is σ = 16696848. Its totient is φ = 10506240.

The previous prime is 13520333. The next prime is 13520363. The reversal of 13520345 is 54302531.

It can be written as a sum of positive squares in 8 ways, for example, as 502681 + 13017664 = 709^2 + 3608^2 .

It is not a de Polignac number, because 13520345 - 2¹⁶ = 13454809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13520345.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29357 + ... + 29813.

It is an arithmetic number, because the mean of its divisors is an integer number (1043553).

Almost surely, 2^13520345 is an apocalyptic number.

It is an amenable number.

13520345 is a deficient number, since it is larger than the sum of its proper divisors (3176503).

13520345 is an equidigital number, since it uses as much as digits as its factorization.

13520345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 13520345 is about 3677.0021756861. The cubic root of 13520345 is about 238.2297113670.

Adding to 13520345 its reverse (54302531), we get a palindrome (67822876).

The spelling of 13520345 in words is "thirteen million, five hundred twenty thousand, three hundred forty-five".