210743 has 12 divisors (see below), whose sum is σ = 241560. Its totient is φ = 183456.

The previous prime is 210739. The next prime is 210761. The reversal of 210743 is 347012.

It is a happy number.

It is not a de Polignac number, because 210743 - 2² = 210739 is a prime.

It is a super-2 number, since 2×210743² = 88825224098, which contains 22 as substring.

It is an Ulam number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4880 + ... + 4922.

It is an arithmetic number, because the mean of its divisors is an integer number (20130).

210743 is a Friedman number, since it can be written as 43*(70^2+1), using all its digits and the basic arithmetic operations.

2²¹⁰⁷⁴³ is an apocalyptic number.

210743 is a deficient number, since it is larger than the sum of its proper divisors (30817).

210743 is a wasteful number, since it uses less digits than its factorization.

210743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98 (or 85 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 210743 is about 459.0675331582. The cubic root of 210743 is about 59.5092375555.

Adding to 210743 its reverse (347012), we get a palindrome (557755).

It can be divided in two parts, 2107 and 43, that multiplied together give a square (90601 = 301²).

The spelling of 210743 in words is "two hundred ten thousand, seven hundred forty-three", and thus it is an iban number.