261122843 has 2 divisors, whose sum is σ = 261122844. Its totient is φ = 261122842.

The previous prime is 261122831. The next prime is 261122857. The reversal of 261122843 is 348221162.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261122843 - 2²⁰ = 260074267 is a prime.

It is a super-3 number, since 3×261122843³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is equal to p_14253833 and since 261122843 and 14253833 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (261122803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130561421 + 130561422.

It is an arithmetic number, because the mean of its divisors is an integer number (130561422).

Almost surely, 2^261122843 is an apocalyptic number.

261122843 is a deficient number, since it is larger than the sum of its proper divisors (1).

261122843 is an equidigital number, since it uses as much as digits as its factorization.

261122843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 29.

The square root of 261122843 is about 16159.2958695607. The cubic root of 261122843 is about 639.1678989120.

The spelling of 261122843 in words is "two hundred sixty-one million, one hundred twenty-two thousand, eight hundred forty-three".