1421998 has 16 divisors (see below), whose sum is σ = 2344320. Its totient is φ = 643896.

The previous prime is 1421989. The next prime is 1422007. The reversal of 1421998 is 8991241.

It is an interprime number because it is at equal distance from previous prime (1421989) and next prime (1422007).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61 + ... + 1687.

It is an arithmetic number, because the mean of its divisors is an integer number (146520).

2^1421998 is an apocalyptic number.

1421998 is a deficient number, since it is larger than the sum of its proper divisors (922322).

1421998 is a wasteful number, since it uses less digits than its factorization.

1421998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its digits is 5184, while the sum is 34.

The square root of 1421998 is about 1192.4755762698. The cubic root of 1421998 is about 112.4517785105.

The spelling of 1421998 in words is "one million, four hundred twenty-one thousand, nine hundred ninety-eight".