212649 has 8 divisors (see below), whose sum is σ = 287712. Its totient is φ = 139680.

The previous prime is 212633. The next prime is 212651. The reversal of 212649 is 946212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212649 - 2⁴ = 212633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212669) by changing a digit.

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, 267 + ... + 704.

It is an arithmetic number, because the mean of its divisors is an integer number (35964).

2²¹²⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

212649 is a deficient number, since it is larger than the sum of its proper divisors (75063).

212649 is an equidigital number, since it uses as much as digits as its factorization.

212649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047.

The product of its digits is 864, while the sum is 24.

The square root of 212649 is about 461.1388077358. The cubic root of 212649 is about 59.6881037100.

It can be divided in two parts, 212 and 649, that added together give a triangular number (861 = T₄₁).

The spelling of 212649 in words is "two hundred twelve thousand, six hundred forty-nine".