13481645 has 4 divisors (see below), whose sum is σ = 16177980. Its totient is φ = 10785312.

The previous prime is 13481639. The next prime is 13481681. The reversal of 13481645 is 54618431.

13481645 is digitally balanced in base 3, 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 9721924 + 3759721 = 3118^2 + 1939^2 .

It is a cyclic number.

It is not a de Polignac number, because 13481645 - 2¹⁸ = 13219501 is a prime.

It is a super-3 number, since 3×13481645³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

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, 1348160 + ... + 1348169.

It is an arithmetic number, because the mean of its divisors is an integer number (4044495).

Almost surely, 2^13481645 is an apocalyptic number.

It is an amenable number.

13481645 is a deficient number, since it is larger than the sum of its proper divisors (2696335).

13481645 is an equidigital number, since it uses as much as digits as its factorization.

13481645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696334.

The product of its digits is 11520, while the sum is 32.

The square root of 13481645 is about 3671.7359654529. The cubic root of 13481645 is about 238.0021949754.

The spelling of 13481645 in words is "thirteen million, four hundred eighty-one thousand, six hundred forty-five".