2421999 has 12 divisors (see below), whose sum is σ = 3611712. Its totient is φ = 1562400.

The previous prime is 2421997. The next prime is 2422027. The reversal of 2421999 is 9991242.

It is not a de Polignac number, because 2421999 - 2¹ = 2421997 is a prime.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2421997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4062 + ... + 4619.

It is an arithmetic number, because the mean of its divisors is an integer number (300976).

2^2421999 is an apocalyptic number.

2421999 is a deficient number, since it is larger than the sum of its proper divisors (1189713).

2421999 is a wasteful number, since it uses less digits than its factorization.

2421999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8718 (or 8715 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 2421999 is about 1556.2772889174. The cubic root of 2421999 is about 134.2944257536.

The spelling of 2421999 in words is "two million, four hundred twenty-one thousand, nine hundred ninety-nine".