261262567 has 2 divisors, whose sum is σ = 261262568. Its totient is φ = 261262566.

The previous prime is 261262553. The next prime is 261262571. The reversal of 261262567 is 765262162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261262567 - 2¹⁹ = 260738279 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261262577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130631283 + 130631284.

It is an arithmetic number, because the mean of its divisors is an integer number (130631284).

Almost surely, 2^261262567 is an apocalyptic number.

261262567 is a deficient number, since it is larger than the sum of its proper divisors (1).

261262567 is an equidigital number, since it uses as much as digits as its factorization.

261262567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 261262567 is about 16163.6186233158. The cubic root of 261262567 is about 639.2818825198.

The spelling of 261262567 in words is "two hundred sixty-one million, two hundred sixty-two thousand, five hundred sixty-seven".