13765121 has 8 divisors (see below), whose sum is σ = 14644224. Its totient is φ = 12893760.

The previous prime is 13765093. The next prime is 13765123. The reversal of 13765121 is 12156731.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13765121 - 2²² = 9570817 is a prime.

It is a super-2 number, since 2×13765121² = 378957112289282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13765123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1976 + ... + 5606.

It is an arithmetic number, because the mean of its divisors is an integer number (1830528).

Almost surely, 2^13765121 is an apocalyptic number.

It is an amenable number.

13765121 is a deficient number, since it is larger than the sum of its proper divisors (879103).

13765121 is a wasteful number, since it uses less digits than its factorization.

13765121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3871.

The product of its digits is 1260, while the sum is 26.

The square root of 13765121 is about 3710.1375985265. The cubic root of 13765121 is about 239.6587801471.

The spelling of 13765121 in words is "thirteen million, seven hundred sixty-five thousand, one hundred twenty-one".