30745142 has 4 divisors (see below), whose sum is σ = 46117716. Its totient is φ = 15372570.

The previous prime is 30745103. The next prime is 30745147. The reversal of 30745142 is 24154703.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30745147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7686284 + ... + 7686287.

It is an arithmetic number, because the mean of its divisors is an integer number (11529429).

Almost surely, 2^30745142 is an apocalyptic number.

30745142 is a deficient number, since it is larger than the sum of its proper divisors (15372574).

30745142 is a wasteful number, since it uses less digits than its factorization.

30745142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15372573.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 30745142 is about 5544.8302047944. The cubic root of 30745142 is about 313.2748286221.

Adding to 30745142 its reverse (24154703), we get a palindrome (54899845).

The spelling of 30745142 in words is "thirty million, seven hundred forty-five thousand, one hundred forty-two".