30142542 has 32 divisors (see below), whose sum is σ = 62985600. Its totient is φ = 9604448.

The previous prime is 30142507. The next prime is 30142543. The reversal of 30142542 is 24524103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30142543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17809 + ... + 19427.

It is an arithmetic number, because the mean of its divisors is an integer number (1968300).

Almost surely, 2^30142542 is an apocalyptic number.

30142542 is an abundant number, since it is smaller than the sum of its proper divisors (32843058).

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

30142542 is a wasteful number, since it uses less digits than its factorization.

30142542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1760.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 30142542 is about 5490.2223998669. Note that the first 3 decimals coincide. The cubic root of 30142542 is about 311.2145967054.

Adding to 30142542 its reverse (24524103), we get a palindrome (54666645).

The spelling of 30142542 in words is "thirty million, one hundred forty-two thousand, five hundred forty-two".