421415999 has 8 divisors (see below), whose sum is σ = 438774000. Its totient is φ = 404395200.

The previous prime is 421415993. The next prime is 421416019. The reversal of 421415999 is 999514124.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421415999 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 (421415993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81749 + ... + 86750.

It is an arithmetic number, because the mean of its divisors is an integer number (54846750).

Almost surely, 2^421415999 is an apocalyptic number.

421415999 is a deficient number, since it is larger than the sum of its proper divisors (17358001).

421415999 is a wasteful number, since it uses less digits than its factorization.

421415999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168601.

The product of its digits is 116640, while the sum is 44.

The square root of 421415999 is about 20528.4193010568. The cubic root of 421415999 is about 749.7279007020.

The spelling of 421415999 in words is "four hundred twenty-one million, four hundred fifteen thousand, nine hundred ninety-nine".