261527587 has 2 divisors, whose sum is σ = 261527588. Its totient is φ = 261527586.

The previous prime is 261527579. The next prime is 261527633. The reversal of 261527587 is 785725162.

261527587 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261527587 - 2³ = 261527579 is a prime.

It is not a weakly prime, because it can be changed into another prime (261525587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130763793 + 130763794.

It is an arithmetic number, because the mean of its divisors is an integer number (130763794).

Almost surely, 2^261527587 is an apocalyptic number.

261527587 is a deficient number, since it is larger than the sum of its proper divisors (1).

261527587 is an equidigital number, since it uses as much as digits as its factorization.

261527587 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 43.

The square root of 261527587 is about 16171.8145858775. The cubic root of 261527587 is about 639.4979681131.

The spelling of 261527587 in words is "two hundred sixty-one million, five hundred twenty-seven thousand, five hundred eighty-seven".