11421980 has 12 divisors (see below), whose sum is σ = 23986200. Its totient is φ = 4568784.

The previous prime is 11421973. The next prime is 11422013. The reversal of 11421980 is 8912411.

It is a congruent number.

It is an unprimeable number.

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, 285530 + ... + 285569.

It is an arithmetic number, because the mean of its divisors is an integer number (1998850).

Almost surely, 2^11421980 is an apocalyptic number.

11421980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11421980 is an abundant number, since it is smaller than the sum of its proper divisors (12564220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11421980 is a wasteful number, since it uses less digits than its factorization.

11421980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571108 (or 571106 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 11421980 is about 3379.6419928744. The cubic root of 11421980 is about 225.2062635298.

The spelling of 11421980 in words is "eleven million, four hundred twenty-one thousand, nine hundred eighty".