420881 has 4 divisors (see below), whose sum is σ = 425700. Its totient is φ = 416064.

The previous prime is 420859. The next prime is 420899. The reversal of 420881 is 188024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36481 + 384400 = 191^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 420881 - 2¹⁴ = 404497 is a prime.

It is a super-2 number, since 2×420881² = 354281632322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420811) 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, 2276 + ... + 2453.

It is an arithmetic number, because the mean of its divisors is an integer number (106425).

2⁴²⁰⁸⁸¹ is an apocalyptic number.

It is an amenable number.

420881 is a deficient number, since it is larger than the sum of its proper divisors (4819).

420881 is an equidigital number, since it uses as much as digits as its factorization.

420881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4818.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 420881 is about 648.7534200295. The cubic root of 420881 is about 74.9410499737.

The spelling of 420881 in words is "four hundred twenty thousand, eight hundred eighty-one".