1421889 has 8 divisors (see below), whose sum is σ = 2166720. Its totient is φ = 812496.

The previous prime is 1421867. The next prime is 1421909. The reversal of 1421889 is 9881241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1421889 - 2⁵ = 1421857 is a prime.

1421889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1421389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33834 + ... + 33875.

It is an arithmetic number, because the mean of its divisors is an integer number (270840).

2^1421889 is an apocalyptic number.

It is an amenable number.

1421889 is a deficient number, since it is larger than the sum of its proper divisors (744831).

1421889 is an equidigital number, since it uses as much as digits as its factorization.

1421889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67719.

The product of its digits is 4608, while the sum is 33.

The square root of 1421889 is about 1192.4298721518. The cubic root of 1421889 is about 112.4489051925.

The spelling of 1421889 in words is "one million, four hundred twenty-one thousand, eight hundred eighty-nine".