30142120 has 32 divisors (see below), whose sum is σ = 68065920. Its totient is φ = 12013120.

The previous prime is 30142109. The next prime is 30142129. The reversal of 30142120 is 2124103.

It is a self number, because there is not a number n which added to its sum of digits gives 30142120.

It is not an unprimeable number, because it can be changed into a prime (30142129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11229 + ... + 13651.

It is an arithmetic number, because the mean of its divisors is an integer number (2127060).

Almost surely, 2^30142120 is an apocalyptic number.

It is an amenable number.

30142120 is an abundant number, since it is smaller than the sum of its proper divisors (37923800).

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

30142120 is a wasteful number, since it uses less digits than its factorization.

30142120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2745 (or 2741 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 30142120 is about 5490.1839677738. The cubic root of 30142120 is about 311.2131443487.

Adding to 30142120 its reverse (2124103), we get a palindrome (32266223).

The spelling of 30142120 in words is "thirty million, one hundred forty-two thousand, one hundred twenty".