261241067 has 2 divisors, whose sum is σ = 261241068. Its totient is φ = 261241066.

The previous prime is 261241049. The next prime is 261241073. The reversal of 261241067 is 760142162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261241067 - 2⁶ = 261241003 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (261241037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130620533 + 130620534.

It is an arithmetic number, because the mean of its divisors is an integer number (130620534).

Almost surely, 2^261241067 is an apocalyptic number.

261241067 is a deficient number, since it is larger than the sum of its proper divisors (1).

261241067 is an equidigital number, since it uses as much as digits as its factorization.

261241067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 261241067 is about 16162.9535357867. The cubic root of 261241067 is about 639.2643459630.

The spelling of 261241067 in words is "two hundred sixty-one million, two hundred forty-one thousand, sixty-seven".