210115142 has 4 divisors (see below), whose sum is σ = 315172716. Its totient is φ = 105057570.

The previous prime is 210115123. The next prime is 210115153. The reversal of 210115142 is 241511012.

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

It is a self number, because there is not a number n which added to its sum of digits gives 210115142.

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 as a sum of consecutive naturals, namely, 52528784 + ... + 52528787.

It is an arithmetic number, because the mean of its divisors is an integer number (78793179).

Almost surely, 2^210115142 is an apocalyptic number.

210115142 is a deficient number, since it is larger than the sum of its proper divisors (105057574).

210115142 is a wasteful number, since it uses less digits than its factorization.

210115142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105057573.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 210115142 is about 14495.3489782068. The cubic root of 210115142 is about 594.5008095646.

Adding to 210115142 its reverse (241511012), we get a palindrome (451626154).

The spelling of 210115142 in words is "two hundred ten million, one hundred fifteen thousand, one hundred forty-two".