87842561 has 8 divisors (see below), whose sum is σ = 92031744. Its totient is φ = 83738160.

The previous prime is 87842533. The next prime is 87842569. The reversal of 87842561 is 16524878.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87842561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87842569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19070 + ... + 23223.

It is an arithmetic number, because the mean of its divisors is an integer number (11503968).

Almost surely, 2^87842561 is an apocalyptic number.

It is an amenable number.

87842561 is a deficient number, since it is larger than the sum of its proper divisors (4189183).

87842561 is a wasteful number, since it uses less digits than its factorization.

87842561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42391.

The product of its digits is 107520, while the sum is 41.

The square root of 87842561 is about 9372.4362361128. The cubic root of 87842561 is about 444.5306012810.

The spelling of 87842561 in words is "eighty-seven million, eight hundred forty-two thousand, five hundred sixty-one".