13980121 has 3 divisors (see below), whose sum is σ = 13983861. Its totient is φ = 13976382.

The previous prime is 13980107. The next prime is 13980149. The reversal of 13980121 is 12108931.

The square root of 13980121 is 3739.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 13980121 - 2¹³ = 13971929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13980151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1870 + ... + 5608.

It is an arithmetic number, because the mean of its divisors is an integer number (4661287).

Almost surely, 2^13980121 is an apocalyptic number.

13980121 is the 3739-th square number.

13980121 is the 1870-th centered octagonal number.

It is an amenable number.

13980121 is a deficient number, since it is larger than the sum of its proper divisors (3740).

13980121 is an frugal number, since it uses more digits than its factorization.

13980121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7478 (or 3739 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 25.

The cubic root of 13980121 is about 240.9000980537.

Multiplying 13980121 by its sum of digits (25), we get a square (349503025 = 18695²).

The spelling of 13980121 in words is "thirteen million, nine hundred eighty thousand, one hundred twenty-one".