13420645 has 16 divisors (see below), whose sum is σ = 18465408. Its totient is φ = 9172800.

The previous prime is 13420643. The next prime is 13420663. The reversal of 13420645 is 54602431.

It is not a de Polignac number, because 13420645 - 2¹ = 13420643 is a prime.

It is a super-2 number, since 2×13420645² = 360227424432050, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13420643) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 18795 + ... + 19495.

It is an arithmetic number, because the mean of its divisors is an integer number (1154088).

Almost surely, 2^13420645 is an apocalyptic number.

It is an amenable number.

13420645 is a deficient number, since it is larger than the sum of its proper divisors (5044763).

13420645 is an equidigital number, since it uses as much as digits as its factorization.

13420645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1260.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 13420645 is about 3663.4198503584. The cubic root of 13420645 is about 237.6426917226.

The spelling of 13420645 in words is "thirteen million, four hundred twenty thousand, six hundred forty-five".