87555261 has 8 divisors (see below), whose sum is σ = 117440064. Its totient is φ = 58020320.

The previous prime is 87555257. The next prime is 87555269. The reversal of 87555261 is 16255578.

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 87555261 - 2² = 87555257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87555269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86880 + ... + 87881.

It is an arithmetic number, because the mean of its divisors is an integer number (14680008).

Almost surely, 2^87555261 is an apocalyptic number.

It is an amenable number.

87555261 is a deficient number, since it is larger than the sum of its proper divisors (29884803).

87555261 is a wasteful number, since it uses less digits than its factorization.

87555261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174931.

The product of its digits is 84000, while the sum is 39.

The square root of 87555261 is about 9357.0968254048. The cubic root of 87555261 is about 444.0454411328.

The spelling of 87555261 in words is "eighty-seven million, five hundred fifty-five thousand, two hundred sixty-one".