13980421 has 16 divisors (see below), whose sum is σ = 17471104. Its totient is φ = 10891584.

The previous prime is 13980403. The next prime is 13980427. The reversal of 13980421 is 12408931.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13980421 - 2²¹ = 11883269 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13980421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13980427) 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 15 ways as a sum of consecutive naturals, for example, 4951 + ... + 7243.

It is an arithmetic number, because the mean of its divisors is an integer number (1091944).

Almost surely, 2^13980421 is an apocalyptic number.

It is an amenable number.

13980421 is a deficient number, since it is larger than the sum of its proper divisors (3490683).

13980421 is a wasteful number, since it uses less digits than its factorization.

13980421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2380.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 13980421 is about 3739.0401174633. The cubic root of 13980421 is about 240.9018212031.

The spelling of 13980421 in words is "thirteen million, nine hundred eighty thousand, four hundred twenty-one".