75409025 has 12 divisors (see below), whose sum is σ = 99008172. Its totient is φ = 56778240.

The previous prime is 75408989. The next prime is 75409031. The reversal of 75409025 is 52090457.

It can be written as a sum of positive squares in 6 ways, for example, as 8300161 + 67108864 = 2881^2 + 8192^2 .

It is not a de Polignac number, because 75409025 - 2⁸ = 75408769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 75408982 and 75409000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88292 + ... + 89141.

It is an arithmetic number, because the mean of its divisors is an integer number (8250681).

Almost surely, 2^75409025 is an apocalyptic number.

It is an amenable number.

75409025 is a deficient number, since it is larger than the sum of its proper divisors (23599147).

75409025 is a wasteful number, since it uses less digits than its factorization.

75409025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177460 (or 177455 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 75409025 is about 8683.8369975490. The cubic root of 75409025 is about 422.4815766391.

The spelling of 75409025 in words is "seventy-five million, four hundred nine thousand, twenty-five".