210142242 has 64 divisors (see below), whose sum is σ = 507494400. Its totient is φ = 64210320.

The previous prime is 210142213. The next prime is 210142271. The reversal of 210142242 is 242241012.

It is an interprime number because it is at equal distance from previous prime (210142213) and next prime (210142271).

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 28503 + ... + 35109.

It is an arithmetic number, because the mean of its divisors is an integer number (7929600).

Almost surely, 2^210142242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 210142242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253747200).

210142242 is an abundant number, since it is smaller than the sum of its proper divisors (297352158).

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

210142242 is a wasteful number, since it uses less digits than its factorization.

210142242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6668 (or 6662 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 210142242 is about 14496.2837306670. The cubic root of 210142242 is about 594.5263674233.

Adding to 210142242 its reverse (242241012), we get a palindrome (452383254).

The spelling of 210142242 in words is "two hundred ten million, one hundred forty-two thousand, two hundred forty-two".