420142231 has 8 divisors (see below), whose sum is σ = 442988720. Its totient is φ = 397369152.

The previous prime is 420142213. The next prime is 420142271. The reversal of 420142231 is 132241024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 420142231 - 2⁷ = 420142103 is a prime.

It is a super-2 number, since 2×420142231² = 353038988539314722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420142199 and 420142208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420142271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6390 + ... + 29683.

It is an arithmetic number, because the mean of its divisors is an integer number (55373590).

Almost surely, 2^420142231 is an apocalyptic number.

420142231 is a deficient number, since it is larger than the sum of its proper divisors (22846489).

420142231 is a wasteful number, since it uses less digits than its factorization.

420142231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36705.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 420142231 is about 20497.3713192692. The cubic root of 420142231 is about 748.9717648802.

Adding to 420142231 its reverse (132241024), we get a palindrome (552383255).

The spelling of 420142231 in words is "four hundred twenty million, one hundred forty-two thousand, two hundred thirty-one".