421172925 has 12 divisors (see below), whose sum is σ = 696339360. Its totient is φ = 224625520.

The previous prime is 421172911. The next prime is 421172957. The reversal of 421172925 is 529271124.

It is not a de Polignac number, because 421172925 - 2⁵ = 421172893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2807745 + ... + 2807894.

It is an arithmetic number, because the mean of its divisors is an integer number (58028280).

Almost surely, 2^421172925 is an apocalyptic number.

It is an amenable number.

421172925 is a deficient number, since it is larger than the sum of its proper divisors (275166435).

421172925 is a wasteful number, since it uses less digits than its factorization.

421172925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5615652 (or 5615647 counting only the distinct ones).

The product of its digits is 10080, while the sum is 33.

The square root of 421172925 is about 20522.4980204652. The cubic root of 421172925 is about 749.5837245513.

The spelling of 421172925 in words is "four hundred twenty-one million, one hundred seventy-two thousand, nine hundred twenty-five".