972845 has 4 divisors (see below), whose sum is σ = 1167420. Its totient is φ = 778272.

The previous prime is 972833. The next prime is 972847. The reversal of 972845 is 548279.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 548279 = 349 ⋅1571.

It can be written as a sum of positive squares in 2 ways, for example, as 662596 + 310249 = 814^2 + 557^2 .

It is a cyclic number.

It is not a de Polignac number, because 972845 - 2¹⁰ = 971821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (972847) 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, 97280 + ... + 97289.

It is an arithmetic number, because the mean of its divisors is an integer number (291855).

2⁹⁷²⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

972845 is a deficient number, since it is larger than the sum of its proper divisors (194575).

972845 is a wasteful number, since it uses less digits than its factorization.

972845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194574.

The product of its digits is 20160, while the sum is 35.

The square root of 972845 is about 986.3290525986. The cubic root of 972845 is about 99.0865141787.

The spelling of 972845 in words is "nine hundred seventy-two thousand, eight hundred forty-five".