75260321 has 4 divisors (see below), whose sum is σ = 75299652. Its totient is φ = 75220992.

The previous prime is 75260291. The next prime is 75260329. The reversal of 75260321 is 12306257.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12306257 = 317 ⋅38821.

It can be written as a sum of positive squares in 2 ways, for example, as 70896400 + 4363921 = 8420^2 + 2089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75260321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75260329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16640 + ... + 20673.

It is an arithmetic number, because the mean of its divisors is an integer number (18824913).

Almost surely, 2^75260321 is an apocalyptic number.

It is an amenable number.

75260321 is a deficient number, since it is larger than the sum of its proper divisors (39331).

75260321 is a wasteful number, since it uses less digits than its factorization.

75260321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39330.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 75260321 is about 8675.2706586020. The cubic root of 75260321 is about 422.2036875238.

Adding to 75260321 its reverse (12306257), we get a palindrome (87566578).

The spelling of 75260321 in words is "seventy-five million, two hundred sixty thousand, three hundred twenty-one".