422981 has 4 divisors (see below), whose sum is σ = 455532. Its totient is φ = 390432.

The previous prime is 422969. The next prime is 422987. The reversal of 422981 is 189224.

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 21025 + 401956 = 145^2 + 634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422981 is a prime.

It is a super-2 number, since 2×422981² = 357825852722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 422981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422987) 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, 16256 + ... + 16281.

It is an arithmetic number, because the mean of its divisors is an integer number (113883).

2⁴²²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

422981 is a deficient number, since it is larger than the sum of its proper divisors (32551).

422981 is a wasteful number, since it uses less digits than its factorization.

422981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32550.

The product of its digits is 1152, while the sum is 26.

The square root of 422981 is about 650.3698947522. The cubic root of 422981 is about 75.0654835495.

The spelling of 422981 in words is "four hundred twenty-two thousand, nine hundred eighty-one".