13420705 has 4 divisors (see below), whose sum is σ = 16104852. Its totient is φ = 10736560.

The previous prime is 13420699. The next prime is 13420723. The reversal of 13420705 is 50702431.

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 4635409 + 8785296 = 2153^2 + 2964^2 .

It is not a de Polignac number, because 13420705 - 2³ = 13420697 is a prime.

It is a Duffinian 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, 1342066 + ... + 1342075.

It is an arithmetic number, because the mean of its divisors is an integer number (4026213).

Almost surely, 2^13420705 is an apocalyptic number.

It is an amenable number.

13420705 is a deficient number, since it is larger than the sum of its proper divisors (2684147).

13420705 is an equidigital number, since it uses as much as digits as its factorization.

13420705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684146.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 13420705 is about 3663.4280394188. The cubic root of 13420705 is about 237.6430458670.

The spelling of 13420705 in words is "thirteen million, four hundred twenty thousand, seven hundred five".