13620165 has 16 divisors (see below), whose sum is σ = 23468928. Its totient is φ = 6705216.

The previous prime is 13620151. The next prime is 13620197. The reversal of 13620165 is 56102631.

13620165 = 257² + 258² + ... + 386².

It is not a de Polignac number, because 13620165 - 2⁴ = 13620149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34729 + ... + 35118.

It is an arithmetic number, because the mean of its divisors is an integer number (1466808).

Almost surely, 2^13620165 is an apocalyptic number.

13620165 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13620165 is a deficient number, since it is larger than the sum of its proper divisors (9848763).

13620165 is a wasteful number, since it uses less digits than its factorization.

13620165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69868.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 13620165 is about 3690.5507719038. The cubic root of 13620165 is about 238.8145535996.

Adding to 13620165 its reverse (56102631), we get a palindrome (69722796).

It can be divided in two parts, 136 and 20165, that added together give a triangular number (20301 = T₂₀₁).

The spelling of 13620165 in words is "thirteen million, six hundred twenty thousand, one hundred sixty-five".