259278641 has 4 divisors (see below), whose sum is σ = 259974132. Its totient is φ = 258583152.

The previous prime is 259278623. The next prime is 259278659. The reversal of 259278641 is 146872952.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (259278623) and next prime (259278659).

It can be written as a sum of positive squares in 2 ways, for example, as 112360000 + 146918641 = 10600^2 + 12121^2 .

It is a cyclic number.

It is not a de Polignac number, because 259278641 - 2¹⁸ = 259016497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 259278592 and 259278601.

It is not an unprimeable number, because it can be changed into a prime (259278601) 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, 347186 + ... + 347931.

It is an arithmetic number, because the mean of its divisors is an integer number (64993533).

Almost surely, 2^259278641 is an apocalyptic number.

It is an amenable number.

259278641 is a deficient number, since it is larger than the sum of its proper divisors (695491).

259278641 is an equidigital number, since it uses as much as digits as its factorization.

259278641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695490.

The product of its digits is 241920, while the sum is 44.

The square root of 259278641 is about 16102.1315669696. The cubic root of 259278641 is about 637.6596168818.

The spelling of 259278641 in words is "two hundred fifty-nine million, two hundred seventy-eight thousand, six hundred forty-one".