30142530 has 160 divisors (see below), whose sum is σ = 94089600. Its totient is φ = 6842880.

The previous prime is 30142507. The next prime is 30142543. The reversal of 30142530 is 3524103.

It is a super-2 number, since 2×30142530² = 1817144229601800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 151371 + ... + 151569.

It is an arithmetic number, because the mean of its divisors is an integer number (588060).

Almost surely, 2^30142530 is an apocalyptic number.

30142530 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 30142530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47044800).

30142530 is an abundant number, since it is smaller than the sum of its proper divisors (63947070).

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

30142530 is a wasteful number, since it uses less digits than its factorization.

30142530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 30142530 is about 5490.2213070149. The cubic root of 30142530 is about 311.2145554064.

Adding to 30142530 its reverse (3524103), we get a palindrome (33666633).

The spelling of 30142530 in words is "thirty million, one hundred forty-two thousand, five hundred thirty".