261124271 has 2 divisors, whose sum is σ = 261124272. Its totient is φ = 261124270.

The previous prime is 261124247. The next prime is 261124273. The reversal of 261124271 is 172421162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261124271 is a prime.

Together with 261124273, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 261124271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261124273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130562135 + 130562136.

It is an arithmetic number, because the mean of its divisors is an integer number (130562136).

Almost surely, 2^261124271 is an apocalyptic number.

261124271 is a deficient number, since it is larger than the sum of its proper divisors (1).

261124271 is an equidigital number, since it uses as much as digits as its factorization.

261124271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 26.

The square root of 261124271 is about 16159.3400545938. The cubic root of 261124271 is about 639.1690640470.

The spelling of 261124271 in words is "two hundred sixty-one million, one hundred twenty-four thousand, two hundred seventy-one".