212104 has 8 divisors (see below), whose sum is σ = 397710. Its totient is φ = 106048.

The previous prime is 212099. The next prime is 212117. The reversal of 212104 is 401212.

It can be written as a sum of positive squares in only one way, i.e., 202500 + 9604 = 450^2 + 98^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13249 + ... + 13264.

2²¹²¹⁰⁴ is an apocalyptic number.

It is an amenable number.

212104 is a deficient number, since it is larger than the sum of its proper divisors (185606).

212104 is a wasteful number, since it uses less digits than its factorization.

212104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26519 (or 26515 counting only the distinct ones).

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

The square root of 212104 is about 460.5475002646. The cubic root of 212104 is about 59.6370683628.

Adding to 212104 its reverse (401212), we get a palindrome (613316).

The spelling of 212104 in words is "two hundred twelve thousand, one hundred four", and thus it is an iban number.