13420065 has 16 divisors (see below), whose sum is σ = 21776256. Its totient is φ = 7056000.

The previous prime is 13420049. The next prime is 13420067. The reversal of 13420065 is 56002431.

13420065 = T₅₇₉ + T₅₈₀ + ... + T₆₄₉.

It is a happy number.

It is not a de Polignac number, because 13420065 - 2⁴ = 13420049 is a prime.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (13420067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5236 + ... + 7365.

It is an arithmetic number, because the mean of its divisors is an integer number (1361016).

Almost surely, 2^13420065 is an apocalyptic number.

13420065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13420065 is a deficient number, since it is larger than the sum of its proper divisors (8356191).

13420065 is a wasteful number, since it uses less digits than its factorization.

13420065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12680.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 13420065 is about 3663.3406884973. The cubic root of 13420065 is about 237.6392682720.

Adding to 13420065 its reverse (56002431), we get a palindrome (69422496).

The spelling of 13420065 in words is "thirteen million, four hundred twenty thousand, sixty-five".