421899 has 8 divisors (see below), whose sum is σ = 571200. Its totient is φ = 276936.

The previous prime is 421891. The next prime is 421907. The reversal of 421899 is 998124.

It is an interprime number because it is at equal distance from previous prime (421891) and next prime (421907).

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

It is not a de Polignac number, because 421899 - 2³ = 421891 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421891) 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, 849 + ... + 1250.

It is an arithmetic number, because the mean of its divisors is an integer number (71400).

2⁴²¹⁸⁹⁹ is an apocalyptic number.

421899 is a deficient number, since it is larger than the sum of its proper divisors (149301).

421899 is a wasteful number, since it uses less digits than its factorization.

421899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169.

The product of its digits is 5184, while the sum is 33.

The square root of 421899 is about 649.5375277842. The cubic root of 421899 is about 75.0014221953.

The spelling of 421899 in words is "four hundred twenty-one thousand, eight hundred ninety-nine".