421098172 has 24 divisors (see below), whose sum is σ = 829850112. Its totient is φ = 185233200.

The previous prime is 421098169. The next prime is 421098173. The reversal of 421098172 is 271890124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421098173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152998 + ... + 155725.

It is an arithmetic number, because the mean of its divisors is an integer number (34577088).

Almost surely, 2^421098172 is an apocalyptic number.

It is an amenable number.

421098172 is a deficient number, since it is larger than the sum of its proper divisors (408751940).

421098172 is a wasteful number, since it uses less digits than its factorization.

421098172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308769 (or 308767 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 421098172 is about 20520.6766944952. The cubic root of 421098172 is about 749.5393746384.

The spelling of 421098172 in words is "four hundred twenty-one million, ninety-eight thousand, one hundred seventy-two".