30011142 has 16 divisors (see below), whose sum is σ = 68596992. Its totient is φ = 8574600.

The previous prime is 30011141. The next prime is 30011147. The reversal of 30011142 is 24111003.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30011141) 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, 357234 + ... + 357317.

It is an arithmetic number, because the mean of its divisors is an integer number (4287312).

Almost surely, 2^30011142 is an apocalyptic number.

30011142 is an abundant number, since it is smaller than the sum of its proper divisors (38585850).

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

30011142 is a wasteful number, since it uses less digits than its factorization.

30011142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714563.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 30011142 is about 5478.2426014188. The cubic root of 30011142 is about 310.7617133725.

Adding to 30011142 its reverse (24111003), we get a palindrome (54122145).

The spelling of 30011142 in words is "thirty million, eleven thousand, one hundred forty-two".