13420815 has 8 divisors (see below), whose sum is σ = 21473328. Its totient is φ = 7157760.

The previous prime is 13420807. The next prime is 13420873. The reversal of 13420815 is 51802431.

13420815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 13420815 - 2³ = 13420807 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 447346 + ... + 447375.

It is an arithmetic number, because the mean of its divisors is an integer number (2684166).

Almost surely, 2^13420815 is an apocalyptic number.

13420815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13420815 is a deficient number, since it is larger than the sum of its proper divisors (8052513).

13420815 is an equidigital number, since it uses as much as digits as its factorization.

13420815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894729.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 13420815 is about 3663.4430526487. The cubic root of 13420815 is about 237.6436951291.

The spelling of 13420815 in words is "thirteen million, four hundred twenty thousand, eight hundred fifteen".