75012720 has 40 divisors (see below), whose sum is σ = 232540176. Its totient is φ = 20003328.

The previous prime is 75012713. The next prime is 75012733. The reversal of 75012720 is 2721057.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156037 + ... + 156516.

Almost surely, 2^75012720 is an apocalyptic number.

It is an amenable number.

75012720 is an abundant number, since it is smaller than the sum of its proper divisors (157527456).

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

75012720 is a wasteful number, since it uses less digits than its factorization.

75012720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312569 (or 312563 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 75012720 is about 8660.9883962513. The cubic root of 75012720 is about 421.7401723332.

Adding to 75012720 its reverse (2721057), we get a palindrome (77733777).

The spelling of 75012720 in words is "seventy-five million, twelve thousand, seven hundred twenty".