30102142 has 16 divisors (see below), whose sum is σ = 51674112. Its totient is φ = 12883320.

The previous prime is 30102139. The next prime is 30102151. The reversal of 30102142 is 24120103.

It is a super-2 number, since 2×30102142² = 1812277905976328, which contains 22 as substring.

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, 19167 + ... + 20677.

It is an arithmetic number, because the mean of its divisors is an integer number (3229632).

Almost surely, 2^30102142 is an apocalyptic number.

30102142 is a deficient number, since it is larger than the sum of its proper divisors (21571970).

30102142 is a wasteful number, since it uses less digits than its factorization.

30102142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943.

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

The square root of 30102142 is about 5486.5418981358. The cubic root of 30102142 is about 311.0754944015.

Adding to 30102142 its reverse (24120103), we get a palindrome (54222245).

The spelling of 30102142 in words is "thirty million, one hundred two thousand, one hundred forty-two".