1421023999 has 8 divisors (see below), whose sum is σ = 1509457248. Its totient is φ = 1333128960.

The previous prime is 1421023957. The next prime is 1421024023. The reversal of 1421023999 is 9993201241.

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 1421023999 - 2¹⁷ = 1420892927 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 (1421023939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129102 + ... + 139675.

It is an arithmetic number, because the mean of its divisors is an integer number (188682156).

Almost surely, 2^1421023999 is an apocalyptic number.

1421023999 is a deficient number, since it is larger than the sum of its proper divisors (88433249).

1421023999 is a wasteful number, since it uses less digits than its factorization.

1421023999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269105.

The product of its (nonzero) digits is 34992, while the sum is 40.

The square root of 1421023999 is about 37696.4719701990. The cubic root of 1421023999 is about 1124.2609793955.

The spelling of 1421023999 in words is "one billion, four hundred twenty-one million, twenty-three thousand, nine hundred ninety-nine".