212154 has 16 divisors (see below), whose sum is σ = 446880. Its totient is φ = 66960.

The previous prime is 212141. The next prime is 212161. The reversal of 212154 is 451212.

It is an unprimeable number.

212154 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 817 + ... + 1044.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2²¹²¹⁵⁴ is an apocalyptic number.

212154 is an abundant number, since it is smaller than the sum of its proper divisors (234726).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212154 is a wasteful number, since it uses less digits than its factorization.

212154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885.

The product of its digits is 80, while the sum is 15.

The square root of 212154 is about 460.6017802831. The cubic root of 212154 is about 59.6417541445.

Adding to 212154 its reverse (451212), we get a palindrome (663366).

The spelling of 212154 in words is "two hundred twelve thousand, one hundred fifty-four".