421057199 has 4 divisors (see below), whose sum is σ = 423640536. Its totient is φ = 418473864.

The previous prime is 421057181. The next prime is 421057213. The reversal of 421057199 is 991750124.

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

It is a cyclic number.

It is not a de Polignac number, because 421057199 - 2²⁴ = 404279983 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 (421057129) 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, 1291424 + ... + 1291749.

It is an arithmetic number, because the mean of its divisors is an integer number (105910134).

Almost surely, 2^421057199 is an apocalyptic number.

421057199 is a deficient number, since it is larger than the sum of its proper divisors (2583337).

421057199 is a wasteful number, since it uses less digits than its factorization.

421057199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583336.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 421057199 is about 20519.6783356855. The cubic root of 421057199 is about 749.5150637018.

The spelling of 421057199 in words is "four hundred twenty-one million, fifty-seven thousand, one hundred ninety-nine".