13229865 has 64 divisors (see below), whose sum is σ = 26265600. Its totient is φ = 6264000.

The previous prime is 13229861. The next prime is 13229897. The reversal of 13229865 is 56892231.

It is not a de Polignac number, because 13229865 - 2² = 13229861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13229861) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87540 + ... + 87690.

It is an arithmetic number, because the mean of its divisors is an integer number (410400).

Almost surely, 2^13229865 is an apocalyptic number.

13229865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13229865 is the 2970-th pentagonal number.

It is an amenable number.

13229865 is a deficient number, since it is larger than the sum of its proper divisors (13035735).

13229865 is a wasteful number, since it uses less digits than its factorization.

13229865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 229 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 13229865 is about 3637.2881381601. The cubic root of 13229865 is about 236.5112504276.

The spelling of 13229865 in words is "thirteen million, two hundred twenty-nine thousand, eight hundred sixty-five".