1421999 has 8 divisors (see below), whose sum is σ = 1516320. Its totient is φ = 1328896.

The previous prime is 1421989. The next prime is 1422007. The reversal of 1421999 is 9991241.

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

It is a cyclic number.

It is not a de Polignac number, because 1421999 - 2¹⁶ = 1356463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1421909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3782 + ... + 4140.

It is an arithmetic number, because the mean of its divisors is an integer number (189540).

2^1421999 is an apocalyptic number.

1421999 is a deficient number, since it is larger than the sum of its proper divisors (94321).

1421999 is a wasteful number, since it uses less digits than its factorization.

1421999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609.

The product of its digits is 5832, while the sum is 35.

The square root of 1421999 is about 1192.4759955655. The cubic root of 1421999 is about 112.4518048705.

The spelling of 1421999 in words is "one million, four hundred twenty-one thousand, nine hundred ninety-nine".