421681995 has 108 divisors (see below), whose sum is σ = 882975600. Its totient is φ = 185613120.

The previous prime is 421681961. The next prime is 421682039. The reversal of 421681995 is 599186124.

It is not a de Polignac number, because 421681995 - 2⁷ = 421681867 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 421681995.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 2118906 + ... + 2119104.

It is an arithmetic number, because the mean of its divisors is an integer number (8175700).

Almost surely, 2^421681995 is an apocalyptic number.

421681995 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

421681995 is an abundant number, since it is smaller than the sum of its proper divisors (461293605).

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

421681995 is a wasteful number, since it uses less digits than its factorization.

421681995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 245 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 421681995 is about 20534.8970048549. The cubic root of 421681995 is about 749.8856092206.

The spelling of 421681995 in words is "four hundred twenty-one million, six hundred eighty-one thousand, nine hundred ninety-five".