210742 has 8 divisors (see below), whose sum is σ = 361296. Its totient is φ = 90312.

The previous prime is 210739. The next prime is 210761. The reversal of 210742 is 247012.

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 7513 + ... + 7540.

It is an arithmetic number, because the mean of its divisors is an integer number (45162).

2²¹⁰⁷⁴² is an apocalyptic number.

210742 is a deficient number, since it is larger than the sum of its proper divisors (150554).

210742 is a wasteful number, since it uses less digits than its factorization.

210742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15062.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 210742 is about 459.0664439926. The cubic root of 210742 is about 59.5091434293.

Adding to 210742 its reverse (247012), we get a palindrome (457754).

The spelling of 210742 in words is "two hundred ten thousand, seven hundred forty-two", and thus it is an iban number.