75120730 has 32 divisors (see below), whose sum is σ = 143681040. Its totient is φ = 28224000.

The previous prime is 75120653. The next prime is 75120761. The reversal of 75120730 is 3702157.

It can be written as a sum of positive squares in 8 ways, for example, as 47210641 + 27910089 = 6871^2 + 5283^2 .

It is a junction number, because it is equal to n+sod(n) for n = 75120695 and 75120704.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 7230 + ... + 14230.

Almost surely, 2^75120730 is an apocalyptic number.

75120730 is a deficient number, since it is larger than the sum of its proper divisors (68560310).

75120730 is a wasteful number, since it uses less digits than its factorization.

75120730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7074.

The product of its (nonzero) digits is 1470, while the sum is 25.

The square root of 75120730 is about 8667.2215847987. The cubic root of 75120730 is about 421.9424949532.

Adding to 75120730 its reverse (3702157), we get a palindrome (78822887).

The spelling of 75120730 in words is "seventy-five million, one hundred twenty thousand, seven hundred thirty".