210006142 has 4 divisors (see below), whose sum is σ = 315009216. Its totient is φ = 105003070.

The previous prime is 210006133. The next prime is 210006149. The reversal of 210006142 is 241600012.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210006149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52501534 + ... + 52501537.

It is an arithmetic number, because the mean of its divisors is an integer number (78752304).

Almost surely, 2^210006142 is an apocalyptic number.

210006142 is a deficient number, since it is larger than the sum of its proper divisors (105003074).

210006142 is a wasteful number, since it uses less digits than its factorization.

210006142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105003073.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 210006142 is about 14491.5886637732. The cubic root of 210006142 is about 594.3979900720.

Adding to 210006142 its reverse (241600012), we get a palindrome (451606154).

The spelling of 210006142 in words is "two hundred ten million, six thousand, one hundred forty-two".