261126343 has 2 divisors, whose sum is σ = 261126344. Its totient is φ = 261126342.

The previous prime is 261126317. The next prime is 261126391. The reversal of 261126343 is 343621162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261126343 - 2⁵ = 261126311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261726343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130563171 + 130563172.

It is an arithmetic number, because the mean of its divisors is an integer number (130563172).

Almost surely, 2^261126343 is an apocalyptic number.

261126343 is a deficient number, since it is larger than the sum of its proper divisors (1).

261126343 is an equidigital number, since it uses as much as digits as its factorization.

261126343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 261126343 is about 16159.4041659957. The cubic root of 261126343 is about 639.1707546275.

The spelling of 261126343 in words is "two hundred sixty-one million, one hundred twenty-six thousand, three hundred forty-three".