421538117 has 32 divisors (see below), whose sum is σ = 568001280. Its totient is φ = 302123520.

The previous prime is 421538111. The next prime is 421538141. The reversal of 421538117 is 711835124.

It is a cyclic number.

It is not a de Polignac number, because 421538117 - 2⁴ = 421538101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421538111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372809 + ... + 373937.

It is an arithmetic number, because the mean of its divisors is an integer number (17750040).

Almost surely, 2^421538117 is an apocalyptic number.

It is an amenable number.

421538117 is a deficient number, since it is larger than the sum of its proper divisors (146463163).

421538117 is a wasteful number, since it uses less digits than its factorization.

421538117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1533.

The product of its digits is 6720, while the sum is 32.

The square root of 421538117 is about 20531.3934500316. The cubic root of 421538117 is about 749.8003124675.

The spelling of 421538117 in words is "four hundred twenty-one million, five hundred thirty-eight thousand, one hundred seventeen".