261526841 has 8 divisors (see below), whose sum is σ = 271367880. Its totient is φ = 251831808.

The previous prime is 261526831. The next prime is 261526873. The reversal of 261526841 is 148625162.

It can be written as a sum of positive squares in 4 ways, for example, as 120012025 + 141514816 = 10955^2 + 11896^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261526841 - 2⁶ = 261526777 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 (261526801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32846 + ... + 40023.

It is an arithmetic number, because the mean of its divisors is an integer number (33920985).

Almost surely, 2^261526841 is an apocalyptic number.

It is an amenable number.

261526841 is a deficient number, since it is larger than the sum of its proper divisors (9841039).

261526841 is an equidigital number, since it uses as much as digits as its factorization.

261526841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73003.

The product of its digits is 23040, while the sum is 35.

The square root of 261526841 is about 16171.7915210406. The cubic root of 261526841 is about 639.4973600626.

The spelling of 261526841 in words is "two hundred sixty-one million, five hundred twenty-six thousand, eight hundred forty-one".