421001634 has 16 divisors (see below), whose sum is σ = 891533088. Its totient is φ = 132078912.

The previous prime is 421001621. The next prime is 421001641. The reversal of 421001634 is 436100124.

It is a self number, because there is not a number n which added to its sum of digits gives 421001634.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2063632 + ... + 2063835.

It is an arithmetic number, because the mean of its divisors is an integer number (55720818).

Almost surely, 2^421001634 is an apocalyptic number.

421001634 is an abundant number, since it is smaller than the sum of its proper divisors (470531454).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421001634 is a wasteful number, since it uses less digits than its factorization.

421001634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127489.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 421001634 is about 20518.3243467882. The cubic root of 421001634 is about 749.4820922221.

Adding to 421001634 its reverse (436100124), we get a palindrome (857101758).

It can be divided in two parts, 42100 and 1634, that added together give a palindrome (43734).

The spelling of 421001634 in words is "four hundred twenty-one million, one thousand, six hundred thirty-four".