13732121 has 4 divisors (see below), whose sum is σ = 14788452. Its totient is φ = 12675792.

The previous prime is 13732097. The next prime is 13732139. The reversal of 13732121 is 12123731.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7778521 + 5953600 = 2789^2 + 2440^2 .

It is a cyclic number.

It is not a de Polignac number, because 13732121 - 2⁶ = 13732057 is a prime.

It is a super-2 number, since 2×13732121² = 377142294317282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13732093 and 13732102.

It is not an unprimeable number, because it can be changed into a prime (13732151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528146 + ... + 528171.

It is an arithmetic number, because the mean of its divisors is an integer number (3697113).

Almost surely, 2^13732121 is an apocalyptic number.

It is an amenable number.

13732121 is a deficient number, since it is larger than the sum of its proper divisors (1056331).

13732121 is a wasteful number, since it uses less digits than its factorization.

13732121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1056330.

The product of its digits is 252, while the sum is 20.

The square root of 13732121 is about 3705.6876554831. The cubic root of 13732121 is about 239.4671104863.

Adding to 13732121 its reverse (12123731), we get a palindrome (25855852).

The spelling of 13732121 in words is "thirteen million, seven hundred thirty-two thousand, one hundred twenty-one".