87061571 has 4 divisors (see below), whose sum is σ = 87106032. Its totient is φ = 87017112.

The previous prime is 87061529. The next prime is 87061613. The reversal of 87061571 is 17516078.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (87061529) and next prime (87061613).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87061571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87067571) 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 3 ways as a sum of consecutive naturals, for example, 19151 + ... + 23256.

It is an arithmetic number, because the mean of its divisors is an integer number (21776508).

Almost surely, 2^87061571 is an apocalyptic number.

87061571 is a deficient number, since it is larger than the sum of its proper divisors (44461).

87061571 is a wasteful number, since it uses less digits than its factorization.

87061571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44460.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 87061571 is about 9330.6790213789. The cubic root of 87061571 is about 443.2092678008.

The spelling of 87061571 in words is "eighty-seven million, sixty-one thousand, five hundred seventy-one".