422542 has 4 divisors (see below), whose sum is σ = 633816. Its totient is φ = 211270.

The previous prime is 422537. The next prime is 422549. The reversal of 422542 is 245224.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422549) by changing a digit.

422542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105634 + ... + 105637.

It is an arithmetic number, because the mean of its divisors is an integer number (158454).

2⁴²²⁵⁴² is an apocalyptic number.

422542 is a deficient number, since it is larger than the sum of its proper divisors (211274).

422542 is a wasteful number, since it uses less digits than its factorization.

422542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211273.

The product of its digits is 640, while the sum is 19.

The square root of 422542 is about 650.0323068894. The cubic root of 422542 is about 75.0395051136.

Adding to 422542 its reverse (245224), we get a palindrome (667766).

The spelling of 422542 in words is "four hundred twenty-two thousand, five hundred forty-two".