75072505 has 4 divisors (see below), whose sum is σ = 90087012. Its totient is φ = 60058000.

The previous prime is 75072499. The next prime is 75072521. The reversal of 75072505 is 50527057.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44568976 + 30503529 = 6676^2 + 5523^2 .

It is not a de Polignac number, because 75072505 - 2³ = 75072497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7507246 + ... + 7507255.

It is an arithmetic number, because the mean of its divisors is an integer number (22521753).

Almost surely, 2^75072505 is an apocalyptic number.

It is an amenable number.

75072505 is a deficient number, since it is larger than the sum of its proper divisors (15014507).

75072505 is a wasteful number, since it uses less digits than its factorization.

75072505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15014506.

The product of its (nonzero) digits is 12250, while the sum is 31.

The square root of 75072505 is about 8664.4391047546. The cubic root of 75072505 is about 421.8521846281.

The spelling of 75072505 in words is "seventy-five million, seventy-two thousand, five hundred five".