9812945 has 4 divisors (see below), whose sum is σ = 11775540. Its totient is φ = 7850352.

The previous prime is 9812941. The next prime is 9812947. The reversal of 9812945 is 5492189.

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 4048144 + 5764801 = 2012^2 + 2401^2 .

It is a cyclic number.

It is not a de Polignac number, because 9812945 - 2² = 9812941 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 9812899 and 9812908.

It is not an unprimeable number, because it can be changed into a prime (9812941) 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, 981290 + ... + 981299.

It is an arithmetic number, because the mean of its divisors is an integer number (2943885).

Almost surely, 2^9812945 is an apocalyptic number.

It is an amenable number.

9812945 is a deficient number, since it is larger than the sum of its proper divisors (1962595).

9812945 is a wasteful number, since it uses less digits than its factorization.

9812945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962594.

The product of its digits is 25920, while the sum is 38.

The square root of 9812945 is about 3132.5620504628. The cubic root of 9812945 is about 214.0916790636.

The spelling of 9812945 in words is "nine million, eight hundred twelve thousand, nine hundred forty-five".