971587 has 4 divisors (see below), whose sum is σ = 1005120. Its totient is φ = 938056.

The previous prime is 971569. The next prime is 971591. The reversal of 971587 is 785179.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 785179 = 17 ⋅46187.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-971587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971387) 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, 16723 + ... + 16780.

It is an arithmetic number, because the mean of its divisors is an integer number (251280).

2⁹⁷¹⁵⁸⁷ is an apocalyptic number.

971587 is a deficient number, since it is larger than the sum of its proper divisors (33533).

971587 is a wasteful number, since it uses less digits than its factorization.

971587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33532.

The product of its digits is 17640, while the sum is 37.

The square root of 971587 is about 985.6911280924. The cubic root of 971587 is about 99.0437856855.

The spelling of 971587 in words is "nine hundred seventy-one thousand, five hundred eighty-seven".