421985025 has 192 divisors, whose sum is σ = 1011363840. Its totient is φ = 167270400.

The previous prime is 421985023. The next prime is 421985087. The reversal of 421985025 is 520589124.

It is not a de Polignac number, because 421985025 - 2¹ = 421985023 is a prime.

It is a super-2 number, since 2×421985025² = 356142722648501250, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (421985023) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 1195249 + ... + 1195601.

It is an arithmetic number, because the mean of its divisors is an integer number (5267520).

Almost surely, 2^421985025 is an apocalyptic number.

421985025 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421985025 is an abundant number, since it is smaller than the sum of its proper divisors (589378815).

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

421985025 is a wasteful number, since it uses less digits than its factorization.

421985025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 421985025 is about 20542.2740951434. The cubic root of 421985025 is about 750.0651943328.

The spelling of 421985025 in words is "four hundred twenty-one million, nine hundred eighty-five thousand, twenty-five".