87081261 has 8 divisors (see below), whose sum is σ = 116168160. Its totient is φ = 58024272.

The previous prime is 87081257. The next prime is 87081311. The reversal of 87081261 is 16218078.

It is a happy number.

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

It is not a de Polignac number, because 87081261 - 2² = 87081257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87081061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550 + ... + 13208.

It is an arithmetic number, because the mean of its divisors is an integer number (14521020).

Almost surely, 2^87081261 is an apocalyptic number.

It is an amenable number.

87081261 is a deficient number, since it is larger than the sum of its proper divisors (29086899).

87081261 is a wasteful number, since it uses less digits than its factorization.

87081261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14955.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 87081261 is about 9331.7340832238. The cubic root of 87081261 is about 443.2426776148.

The spelling of 87081261 in words is "eighty-seven million, eighty-one thousand, two hundred sixty-one".