13661272 has 32 divisors (see below), whose sum is σ = 26484480. Its totient is φ = 6602400.

The previous prime is 13661269. The next prime is 13661279. The reversal of 13661272 is 27216631.

It is a super-3 number, since 3×13661272³ (a number of 22 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13661272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13661279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51813 + ... + 52075.

It is an arithmetic number, because the mean of its divisors is an integer number (827640).

Almost surely, 2^13661272 is an apocalyptic number.

It is an amenable number.

13661272 is a deficient number, since it is larger than the sum of its proper divisors (12823208).

13661272 is a wasteful number, since it uses less digits than its factorization.

13661272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 459 counting only the distinct ones).

The product of its digits is 3024, while the sum is 28.

The square root of 13661272 is about 3696.1157990518. The cubic root of 13661272 is about 239.0545675839.

The spelling of 13661272 in words is "thirteen million, six hundred sixty-one thousand, two hundred seventy-two".