221042 has 8 divisors (see below), whose sum is σ = 336000. Its totient is φ = 109044.

The previous prime is 221021. The next prime is 221047. The reversal of 221042 is 240122.

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

It is not an unprimeable number, because it can be changed into a prime (221047) by changing a digit.

221042 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 in 3 ways as a sum of consecutive naturals, for example, 542 + ... + 857.

It is an arithmetic number, because the mean of its divisors is an integer number (42000).

2²²¹⁰⁴² is an apocalyptic number.

221042 is a deficient number, since it is larger than the sum of its proper divisors (114958).

221042 is a wasteful number, since it uses less digits than its factorization.

221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480.

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 221042 is about 470.1510395607. The cubic root of 221042 is about 60.4632657270.

Adding to 221042 its reverse (240122), we get a palindrome (461164).

The spelling of 221042 in words is "two hundred twenty-one thousand, forty-two", and thus it is an iban number.