210142 has 4 divisors (see below), whose sum is σ = 315216. Its totient is φ = 105070.

The previous prime is 210139. The next prime is 210143. The reversal of 210142 is 241012.

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

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52534 + ... + 52537.

It is an arithmetic number, because the mean of its divisors is an integer number (78804).

2²¹⁰¹⁴² is an apocalyptic number.

210142 is a deficient number, since it is larger than the sum of its proper divisors (105074).

210142 is a wasteful number, since it uses less digits than its factorization.

210142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105073.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 210142 is about 458.4124780152. The cubic root of 210142 is about 59.4526139204.

Adding to 210142 its reverse (241012), we get a palindrome (451154).

The spelling of 210142 in words is "two hundred ten thousand, one hundred forty-two", and thus it is an iban number.