421949859 has 4 divisors (see below), whose sum is σ = 562599816. Its totient is φ = 281299904.

The previous prime is 421949851. The next prime is 421949861. The reversal of 421949859 is 958949124.

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 421949859 - 2³ = 421949851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421949851) 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, 70324974 + ... + 70324979.

It is an arithmetic number, because the mean of its divisors is an integer number (140649954).

Almost surely, 2^421949859 is an apocalyptic number.

421949859 is a deficient number, since it is larger than the sum of its proper divisors (140649957).

421949859 is a wasteful number, since it uses less digits than its factorization.

421949859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140649956.

The product of its digits is 933120, while the sum is 51.

The square root of 421949859 is about 20541.4181350753. The cubic root of 421949859 is about 750.0443582653.

The spelling of 421949859 in words is "four hundred twenty-one million, nine hundred forty-nine thousand, eight hundred fifty-nine".