210142254 has 16 divisors (see below), whose sum is σ = 480325248. Its totient is φ = 60040632.

The previous prime is 210142213. The next prime is 210142271. The reversal of 210142254 is 452241012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 210142254.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2501652 + ... + 2501735.

It is an arithmetic number, because the mean of its divisors is an integer number (30020328).

Almost surely, 2^210142254 is an apocalyptic number.

210142254 is an abundant number, since it is smaller than the sum of its proper divisors (270182994).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

210142254 is a wasteful number, since it uses less digits than its factorization.

210142254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5003399.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 210142254 is about 14496.2841445662. The cubic root of 210142254 is about 594.5263787399.

Adding to 210142254 its reverse (452241012), we get a palindrome (662383266).

The spelling of 210142254 in words is "two hundred ten million, one hundred forty-two thousand, two hundred fifty-four".