13249665 has 96 divisors (see below), whose sum is σ = 28304640. Its totient is φ = 5644800.

The previous prime is 13249657. The next prime is 13249667. The reversal of 13249665 is 56694231.

It is a happy number.

It is not a de Polignac number, because 13249665 - 2³ = 13249657 is a prime.

It is a super-2 number, since 2×13249665² = 351107245224450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

Its product of digits (38880) is a multiple of the sum of its prime factors (135).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13249667) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 186580 + ... + 186650.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

Almost surely, 2^13249665 is an apocalyptic number.

13249665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13249665 is an abundant number, since it is smaller than the sum of its proper divisors (15054975).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13249665 is a wasteful number, since it uses less digits than its factorization.

13249665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 132 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 13249665 is about 3640.0089285605. The cubic root of 13249665 is about 236.6291802912.

The spelling of 13249665 in words is "thirteen million, two hundred forty-nine thousand, six hundred sixty-five".