421240099 has 4 divisors (see below), whose sum is σ = 481417264. Its totient is φ = 361062936.

The previous prime is 421240081. The next prime is 421240103. The reversal of 421240099 is 990042124.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421240099 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421240099.

It is not an unprimeable number, because it can be changed into a prime (421240069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30088572 + ... + 30088585.

It is an arithmetic number, because the mean of its divisors is an integer number (120354316).

Almost surely, 2^421240099 is an apocalyptic number.

421240099 is a deficient number, since it is larger than the sum of its proper divisors (60177165).

421240099 is an equidigital number, since it uses as much as digits as its factorization.

421240099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60177164.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 421240099 is about 20524.1345493543. The cubic root of 421240099 is about 749.6235734727.

The spelling of 421240099 in words is "four hundred twenty-one million, two hundred forty thousand, ninety-nine".