212547242 has 4 divisors (see below), whose sum is σ = 318820866. Its totient is φ = 106273620.

The previous prime is 212547227. The next prime is 212547259. The reversal of 212547242 is 242745212.

212547242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 14579²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 212547241 + 1 = 14579^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53136809 + ... + 53136812.

Almost surely, 2^212547242 is an apocalyptic number.

212547242 is a deficient number, since it is larger than the sum of its proper divisors (106273624).

212547242 is a wasteful number, since it uses less digits than its factorization.

212547242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106273623.

The product of its digits is 8960, while the sum is 29.

The square root of 212547242 is about 14579.0000342959. Note that the first 4 decimals coincide. The cubic root of 212547242 is about 596.7858142815.

The spelling of 212547242 in words is "two hundred twelve million, five hundred forty-seven thousand, two hundred forty-two".