421403625 has 48 divisors (see below), whose sum is σ = 764539776. Its totient is φ = 223303200.

The previous prime is 421403623. The next prime is 421403651. The reversal of 421403625 is 526304124.

It is not a de Polignac number, because 421403625 - 2¹ = 421403623 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421403623) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186754 + ... + 188996.

It is an arithmetic number, because the mean of its divisors is an integer number (15927912).

Almost surely, 2^421403625 is an apocalyptic number.

421403625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

421403625 is a deficient number, since it is larger than the sum of its proper divisors (343136151).

421403625 is a wasteful number, since it uses less digits than its factorization.

421403625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2431 (or 2418 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 421403625 is about 20528.1179117814. The cubic root of 421403625 is about 749.7205625659.

Adding to 421403625 its reverse (526304124), we get a palindrome (947707749).

The spelling of 421403625 in words is "four hundred twenty-one million, four hundred three thousand, six hundred twenty-five".