210981242 has 8 divisors (see below), whose sum is σ = 320807316. Its totient is φ = 104045472.

The previous prime is 210981241. The next prime is 210981247. The reversal of 210981242 is 242189012.

210981242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 210859441 + 121801 = 14521^2 + 349^2 .

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

It is not an unprimeable number, because it can be changed into a prime (210981241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 722393 + ... + 722684.

Almost surely, 2^210981242 is an apocalyptic number.

210981242 is a deficient number, since it is larger than the sum of its proper divisors (109826074).

210981242 is a wasteful number, since it uses less digits than its factorization.

210981242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1445152.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 210981242 is about 14525.1933549953. The cubic root of 210981242 is about 595.3165389608.

The spelling of 210981242 in words is "two hundred ten million, nine hundred eighty-one thousand, two hundred forty-two".