212245 has 16 divisors (see below), whose sum is σ = 295488. Its totient is φ = 144640.

The previous prime is 212243. The next prime is 212281. The reversal of 212245 is 542212.

It is not a de Polignac number, because 212245 - 2¹ = 212243 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 822 + ... + 1048.

It is an arithmetic number, because the mean of its divisors is an integer number (18468).

2²¹²²⁴⁵ is an apocalyptic number.

It is an amenable number.

212245 is a deficient number, since it is larger than the sum of its proper divisors (83243).

212245 is a wasteful number, since it uses less digits than its factorization.

212245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260.

The product of its digits is 160, while the sum is 16.

The square root of 212245 is about 460.7005535052. The cubic root of 212245 is about 59.6502803783.

Adding to 212245 its reverse (542212), we get a palindrome (754457).

The spelling of 212245 in words is "two hundred twelve thousand, two hundred forty-five".