971571 has 12 divisors (see below), whose sum is σ = 1342536. Its totient is φ = 624960.

The previous prime is 971569. The next prime is 971591. The reversal of 971571 is 175179.

It is not a de Polignac number, because 971571 - 2¹ = 971569 is a prime.

971571 is a lucky number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (971501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2715 + ... + 3051.

It is an arithmetic number, because the mean of its divisors is an integer number (111878).

2⁹⁷¹⁵⁷¹ is an apocalyptic number.

971571 is a deficient number, since it is larger than the sum of its proper divisors (370965).

971571 is a wasteful number, since it uses less digits than its factorization.

971571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 371 counting only the distinct ones).

The product of its digits is 2205, while the sum is 30.

The square root of 971571 is about 985.6830119262. The cubic root of 971571 is about 99.0432420014.

The spelling of 971571 in words is "nine hundred seventy-one thousand, five hundred seventy-one".