420130172 has 24 divisors (see below), whose sum is σ = 916648320. Its totient is φ = 163686960.

The previous prime is 420130171. The next prime is 420130177. The reversal of 420130172 is 271031024.

It is a super-2 number, since 2×420130172² = 353018722849499168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420130171) 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, 681722 + ... + 682337.

It is an arithmetic number, because the mean of its divisors is an integer number (38193680).

Almost surely, 2^420130172 is an apocalyptic number.

It is an amenable number.

420130172 is an abundant number, since it is smaller than the sum of its proper divisors (496518148).

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

420130172 is a wasteful number, since it uses less digits than its factorization.

420130172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364081 (or 1364079 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 420130172 is about 20497.0771574876. The cubic root of 420130172 is about 748.9645991029.

Adding to 420130172 its reverse (271031024), we get a palindrome (691161196).

The spelling of 420130172 in words is "four hundred twenty million, one hundred thirty thousand, one hundred seventy-two".