30142242 has 24 divisors (see below), whose sum is σ = 70332444. Its totient is φ = 9274464.

The previous prime is 30142237. The next prime is 30142243. The reversal of 30142242 is 24224103.

It can be written as a sum of positive squares in 2 ways, for example, as 23532201 + 6610041 = 4851^2 + 2571^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30142243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64173 + ... + 64640.

Almost surely, 2^30142242 is an apocalyptic number.

30142242 is an abundant number, since it is smaller than the sum of its proper divisors (40190202).

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

30142242 is a wasteful number, since it uses less digits than its factorization.

30142242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128834 (or 128831 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 30142242 is about 5490.1950785013. The cubic root of 30142242 is about 311.2135642257.

Adding to 30142242 its reverse (24224103), we get a palindrome (54366345).

The spelling of 30142242 in words is "thirty million, one hundred forty-two thousand, two hundred forty-two".