260242505 has 4 divisors (see below), whose sum is σ = 312291012. Its totient is φ = 208194000.

The previous prime is 260242501. The next prime is 260242523. The reversal of 260242505 is 505242062.

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 150013504 + 110229001 = 12248^2 + 10499^2 .

It is not a de Polignac number, because 260242505 - 2² = 260242501 is a prime.

It is a super-2 number, since 2×260242505² = 135452322817350050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260242501) 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, 26024246 + ... + 26024255.

It is an arithmetic number, because the mean of its divisors is an integer number (78072753).

Almost surely, 2^260242505 is an apocalyptic number.

It is an amenable number.

260242505 is a deficient number, since it is larger than the sum of its proper divisors (52048507).

260242505 is an equidigital number, since it uses as much as digits as its factorization.

260242505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52048506.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 260242505 is about 16132.0335048003. The cubic root of 260242505 is about 638.4488027373.

Adding to 260242505 its reverse (505242062), we get a palindrome (765484567).

The spelling of 260242505 in words is "two hundred sixty million, two hundred forty-two thousand, five hundred five".