260513321 has 4 divisors (see below), whose sum is σ = 275837652. Its totient is φ = 245188992.

The previous prime is 260513273. The next prime is 260513333. The reversal of 260513321 is 123315062.

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 140304025 + 120209296 = 11845^2 + 10964^2 .

It is a cyclic number.

It is not a de Polignac number, because 260513321 - 2¹⁸ = 260251177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (260513381) 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, 7662140 + ... + 7662173.

It is an arithmetic number, because the mean of its divisors is an integer number (68959413).

Almost surely, 2^260513321 is an apocalyptic number.

It is an amenable number.

260513321 is a deficient number, since it is larger than the sum of its proper divisors (15324331).

260513321 is a wasteful number, since it uses less digits than its factorization.

260513321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15324330.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 260513321 is about 16140.4250563608. The cubic root of 260513321 is about 638.6701888248.

Adding to 260513321 its reverse (123315062), we get a palindrome (383828383).

The spelling of 260513321 in words is "two hundred sixty million, five hundred thirteen thousand, three hundred twenty-one".