10820945 has 8 divisors (see below), whose sum is σ = 13080744. Its totient is φ = 8593024.

The previous prime is 10820939. The next prime is 10820947. The reversal of 10820945 is 54902801.

It can be written as a sum of positive squares in 4 ways, for example, as 2347024 + 8473921 = 1532^2 + 2911^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10820945 - 2⁶ = 10820881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10820947) 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 7 ways as a sum of consecutive naturals, for example, 7214 + ... + 8583.

It is an arithmetic number, because the mean of its divisors is an integer number (1635093).

Almost surely, 2^10820945 is an apocalyptic number.

It is an amenable number.

10820945 is a deficient number, since it is larger than the sum of its proper divisors (2259799).

10820945 is a wasteful number, since it uses less digits than its factorization.

10820945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15939.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 10820945 is about 3289.5204817724. The cubic root of 10820945 is about 221.1846903110.

The spelling of 10820945 in words is "ten million, eight hundred twenty thousand, nine hundred forty-five".