13775121 has 6 divisors (see below), whose sum is σ = 19897410. Its totient is φ = 9183408.

The previous prime is 13775107. The next prime is 13775147. The reversal of 13775121 is 12157731.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13771521 + 3600 = 3711^2 + 60^2 .

It is not a de Polignac number, because 13775121 - 2¹¹ = 13773073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13775621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 765276 + ... + 765293.

It is an arithmetic number, because the mean of its divisors is an integer number (3316235).

Almost surely, 2^13775121 is an apocalyptic number.

It is an amenable number.

13775121 is a deficient number, since it is larger than the sum of its proper divisors (6122289).

13775121 is a wasteful number, since it uses less digits than its factorization.

13775121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530575 (or 1530572 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 13775121 is about 3711.4850127678. The cubic root of 13775121 is about 239.7168013754.

The spelling of 13775121 in words is "thirteen million, seven hundred seventy-five thousand, one hundred twenty-one".