971765 has 4 divisors (see below), whose sum is σ = 1166124. Its totient is φ = 777408.

The previous prime is 971759. The next prime is 971767. The reversal of 971765 is 567179.

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

It can be written as a sum of positive squares in 2 ways, for example, as 421201 + 550564 = 649^2 + 742^2 .

It is a cyclic number.

It is not a de Polignac number, because 971765 - 2¹⁶ = 906229 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (971767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97172 + ... + 97181.

It is an arithmetic number, because the mean of its divisors is an integer number (291531).

2⁹⁷¹⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

971765 is a deficient number, since it is larger than the sum of its proper divisors (194359).

971765 is a wasteful number, since it uses less digits than its factorization.

971765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194358.

The product of its digits is 13230, while the sum is 35.

The square root of 971765 is about 985.7814159336. The cubic root of 971765 is about 99.0498337688.

The spelling of 971765 in words is "nine hundred seventy-one thousand, seven hundred sixty-five".