422661 has 8 divisors (see below), whose sum is σ = 570240. Its totient is φ = 278432.

The previous prime is 422657. The next prime is 422689. The reversal of 422661 is 166224.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 422661 - 2² = 422657 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (71280).

2⁴²²⁶⁶¹ is an apocalyptic number.

It is an amenable number.

422661 is a deficient number, since it is larger than the sum of its proper divisors (147579).

422661 is a wasteful number, since it uses less digits than its factorization.

422661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1675.

The product of its digits is 576, while the sum is 21.

The square root of 422661 is about 650.1238343577. The cubic root of 422661 is about 75.0465488812.

Adding to 422661 its reverse (166224), we get a palindrome (588885).

The spelling of 422661 in words is "four hundred twenty-two thousand, six hundred sixty-one".