421516870 has 32 divisors (see below), whose sum is σ = 810904608. Its totient is φ = 157198848.

The previous prime is 421516867. The next prime is 421516871. The reversal of 421516870 is 78615124.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421516871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6604 + ... + 29776.

It is an arithmetic number, because the mean of its divisors is an integer number (25340769).

Almost surely, 2^421516870 is an apocalyptic number.

421516870 is a deficient number, since it is larger than the sum of its proper divisors (389387738).

421516870 is a wasteful number, since it uses less digits than its factorization.

421516870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23304.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 421516870 is about 20530.8760163808. The cubic root of 421516870 is about 749.7877147338.

The spelling of 421516870 in words is "four hundred twenty-one million, five hundred sixteen thousand, eight hundred seventy".