421545125 has 16 divisors (see below), whose sum is σ = 538329792. Its totient is φ = 329389200.

The previous prime is 421545119. The next prime is 421545133. The reversal of 421545125 is 521545124.

It is not a de Polignac number, because 421545125 - 2⁴ = 421545109 is a prime.

It is a super-2 number, since 2×421545125² = 355400584822531250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33839 + ... + 44588.

It is an arithmetic number, because the mean of its divisors is an integer number (33645612).

Almost surely, 2^421545125 is an apocalyptic number.

It is an amenable number.

421545125 is a deficient number, since it is larger than the sum of its proper divisors (116784667).

421545125 is an equidigital number, since it uses as much as digits as its factorization.

421545125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78485 (or 78475 counting only the distinct ones).

The product of its digits is 8000, while the sum is 29.

The square root of 421545125 is about 20531.5641147965. The cubic root of 421545125 is about 749.8044675457.

Subtracting 421545125 from its reverse (521545124), we obtain a palindrome (99999999).

The spelling of 421545125 in words is "four hundred twenty-one million, five hundred forty-five thousand, one hundred twenty-five".