420291 has 24 divisors (see below), whose sum is σ = 668304. Its totient is φ = 253440.

The previous prime is 420271. The next prime is 420293. The reversal of 420291 is 192024.

It is not a de Polignac number, because 420291 - 2⁷ = 420163 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420291.

It is not an unprimeable number, because it can be changed into a prime (420293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6240 + ... + 6306.

It is an arithmetic number, because the mean of its divisors is an integer number (27846).

2⁴²⁰²⁹¹ is an apocalyptic number.

420291 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

420291 is a deficient number, since it is larger than the sum of its proper divisors (248013).

420291 is a wasteful number, since it uses less digits than its factorization.

420291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 420291 is about 648.2985423399. The cubic root of 420291 is about 74.9060156083.

The spelling of 420291 in words is "four hundred twenty thousand, two hundred ninety-one".