420031 has 4 divisors (see below), whose sum is σ = 423000. Its totient is φ = 417064.

The previous prime is 420029. The next prime is 420037. The reversal of 420031 is 130024.

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 420031 - 2¹ = 420029 is a prime.

It is a super-2 number, since 2×420031² = 352852081922, which contains 22 as substring.

It is a Duffinian number.

420031 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420037) 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, 1261 + ... + 1558.

It is an arithmetic number, because the mean of its divisors is an integer number (105750).

2⁴²⁰⁰³¹ is an apocalyptic number.

420031 is a deficient number, since it is larger than the sum of its proper divisors (2969).

420031 is a wasteful number, since it uses less digits than its factorization.

420031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2968.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 420031 is about 648.0979864187. The cubic root of 420031 is about 74.8905663272.

Adding to 420031 its reverse (130024), we get a palindrome (550055).

The spelling of 420031 in words is "four hundred twenty thousand, thirty-one".