421908102 has 160 divisors (see below), whose sum is σ = 1191801600. Its totient is φ = 108371520.

The previous prime is 421908101. The next prime is 421908103. The reversal of 421908102 is 201809124.

It is an interprime number because it is at equal distance from previous prime (421908101) and next prime (421908103).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421908101) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1858513 + ... + 1858739.

It is an arithmetic number, because the mean of its divisors is an integer number (7448760).

Almost surely, 2^421908102 is an apocalyptic number.

421908102 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 421908102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595900800).

421908102 is an abundant number, since it is smaller than the sum of its proper divisors (769893498).

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

421908102 is a wasteful number, since it uses less digits than its factorization.

421908102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 421908102 is about 20540.4017000642. The cubic root of 421908102 is about 750.0196154870.

The spelling of 421908102 in words is "four hundred twenty-one million, nine hundred eight thousand, one hundred two".