210042245 has 32 divisors (see below), whose sum is σ = 304646400. Its totient is φ = 135806976.

The previous prime is 210042199. The next prime is 210042257. The reversal of 210042245 is 542240012.

It is a happy number.

210042245 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 210042245 - 2⁶ = 210042181 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 170291 + ... + 171519.

It is an arithmetic number, because the mean of its divisors is an integer number (9520200).

Almost surely, 2^210042245 is an apocalyptic number.

It is an amenable number.

210042245 is a deficient number, since it is larger than the sum of its proper divisors (94604155).

210042245 is a wasteful number, since it uses less digits than its factorization.

210042245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 210042245 is about 14492.8342638699. The cubic root of 210042245 is about 594.4320499028.

Adding to 210042245 its reverse (542240012), we get a palindrome (752282257).

The spelling of 210042245 in words is "two hundred ten million, forty-two thousand, two hundred forty-five".