261250567 has 2 divisors, whose sum is σ = 261250568. Its totient is φ = 261250566.

The previous prime is 261250519. The next prime is 261250571. The reversal of 261250567 is 765052162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261250567 - 2⁷ = 261250439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261250597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130625283 + 130625284.

It is an arithmetic number, because the mean of its divisors is an integer number (130625284).

Almost surely, 2^261250567 is an apocalyptic number.

261250567 is a deficient number, since it is larger than the sum of its proper divisors (1).

261250567 is an equidigital number, since it uses as much as digits as its factorization.

261250567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 261250567 is about 16163.2474150463. The cubic root of 261250567 is about 639.2720947928.

The spelling of 261250567 in words is "two hundred sixty-one million, two hundred fifty thousand, five hundred sixty-seven".