13420765 has 8 divisors (see below), whose sum is σ = 16660440. Its totient is φ = 10366272.

The previous prime is 13420747. The next prime is 13420801. The reversal of 13420765 is 56702431.

It can be written as a sum of positive squares in 4 ways, for example, as 127449 + 13293316 = 357^2 + 3646^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13420765 - 2⁷ = 13420637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46134 + ... + 46423.

It is an arithmetic number, because the mean of its divisors is an integer number (2082555).

Almost surely, 2^13420765 is an apocalyptic number.

It is an amenable number.

13420765 is a deficient number, since it is larger than the sum of its proper divisors (3239675).

13420765 is an equidigital number, since it uses as much as digits as its factorization.

13420765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92591.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 13420765 is about 3663.4362284609. The cubic root of 13420765 is about 237.6434000104.

The spelling of 13420765 in words is "thirteen million, four hundred twenty thousand, seven hundred sixty-five".