13747121 has 2 divisors, whose sum is σ = 13747122. Its totient is φ = 13747120.

The previous prime is 13747109. The next prime is 13747147. The reversal of 13747121 is 12174731.

It is a happy number.

13747121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (13747147) can be obtained adding 13747121 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13690000 + 57121 = 3700^2 + 239^2 .

It is an emirp because it is prime and its reverse (12174731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13747121 - 2²² = 9552817 is a prime.

It is not a weakly prime, because it can be changed into another prime (13741121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6873560 + 6873561.

It is an arithmetic number, because the mean of its divisors is an integer number (6873561).

Almost surely, 2^13747121 is an apocalyptic number.

It is an amenable number.

13747121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13747121 is an equidigital number, since it uses as much as digits as its factorization.

13747121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1176, while the sum is 26.

The square root of 13747121 is about 3707.7110189442. The cubic root of 13747121 is about 239.5542710827.

The spelling of 13747121 in words is "thirteen million, seven hundred forty-seven thousand, one hundred twenty-one".