212442 has 8 divisors (see below), whose sum is σ = 424896. Its totient is φ = 70812.

The previous prime is 212437. The next prime is 212447. The reversal of 212442 is 244212.

212442 is nontrivially palindromic in base 5.

It is an interprime number because it is at equal distance from previous prime (212437) and next prime (212447).

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

212442 is an admirable number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (212447) 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, 17698 + ... + 17709.

It is an arithmetic number, because the mean of its divisors is an integer number (53112).

2²¹²⁴⁴² is an apocalyptic number.

212442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212442 is a wasteful number, since it uses less digits than its factorization.

212442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35412.

The product of its digits is 128, while the sum is 15.

The square root of 212442 is about 460.9143087386. The cubic root of 212442 is about 59.6687299239.

Adding to 212442 its reverse (244212), we get a palindrome (456654).

The spelling of 212442 in words is "two hundred twelve thousand, four hundred forty-two", and thus it is an iban number.