13445645 has 4 divisors (see below), whose sum is σ = 16134780. Its totient is φ = 10756512.

The previous prime is 13445633. The next prime is 13445659. The reversal of 13445645 is 54654431.

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 2778889 + 10666756 = 1667^2 + 3266^2 .

It is a cyclic number.

It is not a de Polignac number, because 13445645 - 2⁴ = 13445629 is a prime.

It is a super-3 number, since 3×13445645³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1344560 + ... + 1344569.

It is an arithmetic number, because the mean of its divisors is an integer number (4033695).

Almost surely, 2^13445645 is an apocalyptic number.

It is an amenable number.

13445645 is a deficient number, since it is larger than the sum of its proper divisors (2689135).

13445645 is an equidigital number, since it uses as much as digits as its factorization.

13445645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689134.

The product of its digits is 28800, while the sum is 32.

The square root of 13445645 is about 3666.8303751333. The cubic root of 13445645 is about 237.7901605935.

The spelling of 13445645 in words is "thirteen million, four hundred forty-five thousand, six hundred forty-five".