260911587 has 4 divisors (see below), whose sum is σ = 347882120. Its totient is φ = 173941056.

The previous prime is 260911513. The next prime is 260911589. The reversal of 260911587 is 785119062.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 260911587 - 2⁷ = 260911459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (260911589) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43485262 + ... + 43485267.

It is an arithmetic number, because the mean of its divisors is an integer number (86970530).

Almost surely, 2^260911587 is an apocalyptic number.

260911587 is a deficient number, since it is larger than the sum of its proper divisors (86970533).

260911587 is an equidigital number, since it uses as much as digits as its factorization.

260911587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86970532.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 260911587 is about 16152.7578759789. The cubic root of 260911587 is about 638.9954839133.

It can be divided in two parts, 2609 and 11587, that added together give a triangular number (14196 = T₁₆₈).

The spelling of 260911587 in words is "two hundred sixty million, nine hundred eleven thousand, five hundred eighty-seven".