30115142 has 16 divisors (see below), whose sum is σ = 47410272. Its totient is φ = 14319360.

The previous prime is 30115123. The next prime is 30115159. The reversal of 30115142 is 24151103.

It is a self number, because there is not a number n which added to its sum of digits gives 30115142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6518 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (2963142).

Almost surely, 2^30115142 is an apocalyptic number.

30115142 is a deficient number, since it is larger than the sum of its proper divisors (17295130).

30115142 is a wasteful number, since it uses less digits than its factorization.

30115142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3823.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 30115142 is about 5487.7264873534. The cubic root of 30115142 is about 311.1202686174.

Adding to 30115142 its reverse (24151103), we get a palindrome (54266245).

The spelling of 30115142 in words is "thirty million, one hundred fifteen thousand, one hundred forty-two".