210012345 has 40 divisors (see below), whose sum is σ = 389469960. Its totient is φ = 108138240.

The previous prime is 210012323. The next prime is 210012389. The reversal of 210012345 is 543210012.

It can be written as a sum of positive squares in 4 ways, for example, as 14907321 + 195105024 = 3861^2 + 13968^2 .

It is not a de Polignac number, because 210012345 - 2¹³ = 210004153 is a prime.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 2805 + ... + 20685.

It is an arithmetic number, because the mean of its divisors is an integer number (9736749).

Almost surely, 2^210012345 is an apocalyptic number.

It is an amenable number.

210012345 is a deficient number, since it is larger than the sum of its proper divisors (179457615).

210012345 is a wasteful number, since it uses less digits than its factorization.

210012345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17927 (or 17918 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 210012345 is about 14491.8026828963. The cubic root of 210012345 is about 594.4038423047.

Adding to 210012345 its reverse (543210012), we get a palindrome (753222357).

The spelling of 210012345 in words is "two hundred ten million, twelve thousand, three hundred forty-five".