260821087 has 8 divisors (see below), whose sum is σ = 263940912. Its totient is φ = 257712000.

The previous prime is 260821061. The next prime is 260821091. The reversal of 260821087 is 780128062.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 260821087 - 2²⁷ = 126603359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (260821097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52887 + ... + 57607.

It is an arithmetic number, because the mean of its divisors is an integer number (32992614).

Almost surely, 2^260821087 is an apocalyptic number.

260821087 is a deficient number, since it is larger than the sum of its proper divisors (3119825).

260821087 is a wasteful number, since it uses less digits than its factorization.

260821087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 260821087 is about 16149.9562538107. The cubic root of 260821087 is about 638.9215945428.

The spelling of 260821087 in words is "two hundred sixty million, eight hundred twenty-one thousand, eighty-seven".