74142730 has 8 divisors (see below), whose sum is σ = 133456932. Its totient is φ = 29657088.

The previous prime is 74142721. The next prime is 74142737. The reversal of 74142730 is 3724147.

It can be written as a sum of positive squares in 2 ways, for example, as 62425801 + 11716929 = 7901^2 + 3423^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (74142737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3707127 + ... + 3707146.

Almost surely, 2^74142730 is an apocalyptic number.

74142730 is a deficient number, since it is larger than the sum of its proper divisors (59314202).

74142730 is a wasteful number, since it uses less digits than its factorization.

74142730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7414280.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 74142730 is about 8610.6172833311. The cubic root of 74142730 is about 420.1033948014.

Adding to 74142730 its reverse (3724147), we get a palindrome (77866877).

The spelling of 74142730 in words is "seventy-four million, one hundred forty-two thousand, seven hundred thirty".