420431 has 8 divisors (see below), whose sum is σ = 471504. Its totient is φ = 371520.

The previous prime is 420421. The next prime is 420439. The reversal of 420431 is 134024.

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 420431 - 2⁶ = 420367 is a prime.

It is a super-2 number, since 2×420431² = 353524451522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110 + ... + 923.

It is an arithmetic number, because the mean of its divisors is an integer number (58938).

2⁴²⁰⁴³¹ is an apocalyptic number.

420431 is a deficient number, since it is larger than the sum of its proper divisors (51073).

420431 is a wasteful number, since it uses less digits than its factorization.

420431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 420431 is about 648.4065082955. The cubic root of 420431 is about 74.9143318130.

Adding to 420431 its reverse (134024), we get a palindrome (554455).

The spelling of 420431 in words is "four hundred twenty thousand, four hundred thirty-one".