209012 has 6 divisors (see below), whose sum is σ = 365778. Its totient is φ = 104504.

The previous prime is 208997. The next prime is 209021. The reversal of 209012 is 210902.

It can be written as a sum of positive squares in only one way, i.e., 163216 + 45796 = 404^2 + 214^2 .

It is a super-2 number, since 2×209012² = 87372032288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

209012 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 as a sum of consecutive naturals, namely, 26123 + ... + 26130.

It is an arithmetic number, because the mean of its divisors is an integer number (60963).

2²⁰⁹⁰¹² is an apocalyptic number.

It is an amenable number.

209012 is a deficient number, since it is larger than the sum of its proper divisors (156766).

209012 is a wasteful number, since it uses less digits than its factorization.

209012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52257 (or 52255 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 209012 is about 457.1783021973. The cubic root of 209012 is about 59.3458571664.

Adding to 209012 its reverse (210902), we get a palindrome (419914).

The spelling of 209012 in words is "two hundred nine thousand, twelve".