87321261 has 8 divisors (see below), whose sum is σ = 119136160. Its totient is φ = 56860272.

The previous prime is 87321251. The next prime is 87321277. The reversal of 87321261 is 16212378.

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

It is not a de Polignac number, because 87321261 - 2⁹ = 87320749 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 (87321211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338326 + ... + 338583.

It is an arithmetic number, because the mean of its divisors is an integer number (14892020).

Almost surely, 2^87321261 is an apocalyptic number.

It is an amenable number.

87321261 is a deficient number, since it is larger than the sum of its proper divisors (31814899).

87321261 is a wasteful number, since it uses less digits than its factorization.

87321261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676955.

The product of its digits is 4032, while the sum is 30.

The square root of 87321261 is about 9344.5845814568. The cubic root of 87321261 is about 443.6495032356.

The spelling of 87321261 in words is "eighty-seven million, three hundred twenty-one thousand, two hundred sixty-one".