13665072 has 20 divisors (see below), whose sum is σ = 35301560. Its totient is φ = 4555008.

The previous prime is 13665053. The next prime is 13665083. The reversal of 13665072 is 27056631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142297 + ... + 142392.

It is an arithmetic number, because the mean of its divisors is an integer number (1765078).

Almost surely, 2^13665072 is an apocalyptic number.

13665072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13665072 is an abundant number, since it is smaller than the sum of its proper divisors (21636488).

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

13665072 is a wasteful number, since it uses less digits than its factorization.

13665072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284700 (or 284694 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 13665072 is about 3696.6298164680. The cubic root of 13665072 is about 239.0767305553.

The spelling of 13665072 in words is "thirteen million, six hundred sixty-five thousand, seventy-two".