30112542 has 24 divisors (see below), whose sum is σ = 69082416. Its totient is φ = 9446976.

The previous prime is 30112541. The next prime is 30112567. The reversal of 30112542 is 24521103.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30112541) 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, 48898 + ... + 49509.

It is an arithmetic number, because the mean of its divisors is an integer number (2878434).

Almost surely, 2^30112542 is an apocalyptic number.

30112542 is an abundant number, since it is smaller than the sum of its proper divisors (38969874).

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

30112542 is a wasteful number, since it uses less digits than its factorization.

30112542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98432 (or 98429 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 30112542 is about 5487.4895899673. The cubic root of 30112542 is about 311.1113148052. Note that the first 3 decimals are identical.

Adding to 30112542 its reverse (24521103), we get a palindrome (54633645).

The spelling of 30112542 in words is "thirty million, one hundred twelve thousand, five hundred forty-two".