420125231 has 4 divisors (see below), whose sum is σ = 420522264. Its totient is φ = 419728200.

The previous prime is 420125227. The next prime is 420125243. The reversal of 420125231 is 132521024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420125231 - 2² = 420125227 is a prime.

It is a super-2 number, since 2×420125231² = 353010419445606722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420125201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196925 + ... + 199046.

It is an arithmetic number, because the mean of its divisors is an integer number (105130566).

Almost surely, 2^420125231 is an apocalyptic number.

420125231 is a deficient number, since it is larger than the sum of its proper divisors (397033).

420125231 is a wasteful number, since it uses less digits than its factorization.

420125231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397032.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 420125231 is about 20496.9566277533. The cubic root of 420125231 is about 748.9616629903.

Adding to 420125231 its reverse (132521024), we get a palindrome (552646255).

The spelling of 420125231 in words is "four hundred twenty million, one hundred twenty-five thousand, two hundred thirty-one".