13930121 has 4 divisors (see below), whose sum is σ = 14410500. Its totient is φ = 13449744.

The previous prime is 13930087. The next prime is 13930127. The reversal of 13930121 is 12103931.

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 11868025 + 2062096 = 3445^2 + 1436^2 .

It is a cyclic number.

It is not a de Polignac number, because 13930121 - 2¹⁴ = 13913737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13930093 and 13930102.

It is not an unprimeable number, because it can be changed into a prime (13930127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240146 + ... + 240203.

It is an arithmetic number, because the mean of its divisors is an integer number (3602625).

Almost surely, 2^13930121 is an apocalyptic number.

It is an amenable number.

13930121 is a deficient number, since it is larger than the sum of its proper divisors (480379).

13930121 is an equidigital number, since it uses as much as digits as its factorization.

13930121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480378.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 13930121 is about 3732.3077311497. The cubic root of 13930121 is about 240.6125613630.

The spelling of 13930121 in words is "thirteen million, nine hundred thirty thousand, one hundred twenty-one".