420331 has 2 divisors, whose sum is σ = 420332. Its totient is φ = 420330.

The previous prime is 420323. The next prime is 420341. The reversal of 420331 is 133024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420331 - 2³ = 420323 is a prime.

It is a super-2 number, since 2×420331² = 353356299122, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 11.

It is not a weakly prime, because it can be changed into another prime (420341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210165 + 210166.

It is an arithmetic number, because the mean of its divisors is an integer number (210166).

2⁴²⁰³³¹ is an apocalyptic number.

420331 is a deficient number, since it is larger than the sum of its proper divisors (1).

420331 is an equidigital number, since it uses as much as digits as its factorization.

420331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 420331 is about 648.3293915904. The cubic root of 420331 is about 74.9083918552.

Adding to 420331 its reverse (133024), we get a palindrome (553355).

The spelling of 420331 in words is "four hundred twenty thousand, three hundred thirty-one".