212658945 has 8 divisors (see below), whose sum is σ = 340254336. Its totient is φ = 113418096.

The previous prime is 212658937. The next prime is 212658959. The reversal of 212658945 is 549856212.

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

It is not a de Polignac number, because 212658945 - 2³ = 212658937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212658897 and 212658906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7088617 + ... + 7088646.

It is an arithmetic number, because the mean of its divisors is an integer number (42531792).

Almost surely, 2^212658945 is an apocalyptic number.

It is an amenable number.

212658945 is a deficient number, since it is larger than the sum of its proper divisors (127595391).

212658945 is a wasteful number, since it uses less digits than its factorization.

212658945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14177271.

The product of its digits is 172800, while the sum is 42.

The square root of 212658945 is about 14582.8304865688. The cubic root of 212658945 is about 596.8903417746.

The spelling of 212658945 in words is "two hundred twelve million, six hundred fifty-eight thousand, nine hundred forty-five".