75721325 has 12 divisors (see below), whose sum is σ = 94065780. Its totient is φ = 60466560.

The previous prime is 75721309. The next prime is 75721339. The reversal of 75721325 is 52312757.

It can be written as a sum of positive squares in 6 ways, for example, as 743044 + 74978281 = 862^2 + 8659^2 .

It is not a de Polignac number, because 75721325 - 2⁴ = 75721309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 75721291 and 75721300.

It is a congruent number.

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, 12971 + ... + 17879.

It is an arithmetic number, because the mean of its divisors is an integer number (7838815).

Almost surely, 2^75721325 is an apocalyptic number.

It is an amenable number.

75721325 is a deficient number, since it is larger than the sum of its proper divisors (18344455).

75721325 is a wasteful number, since it uses less digits than its factorization.

75721325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5536 (or 5531 counting only the distinct ones).

The product of its digits is 14700, while the sum is 32.

The square root of 75721325 is about 8701.8001011285. The cubic root of 75721325 is about 423.0639970834.

The spelling of 75721325 in words is "seventy-five million, seven hundred twenty-one thousand, three hundred twenty-five".