1421920 has 24 divisors (see below), whose sum is σ = 3359664. Its totient is φ = 568704.

The previous prime is 1421911. The next prime is 1421933. The reversal of 1421920 is 291241.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4284 + ... + 4603.

It is an arithmetic number, because the mean of its divisors is an integer number (139986).

2^1421920 is an apocalyptic number.

1421920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1421920 is an abundant number, since it is smaller than the sum of its proper divisors (1937744).

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

1421920 is an equidigital number, since it uses as much as digits as its factorization.

1421920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8902 (or 8894 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 1421920 is about 1192.4428707490. The cubic root of 1421920 is about 112.4497223896.

The spelling of 1421920 in words is "one million, four hundred twenty-one thousand, nine hundred twenty".