945905 has 8 divisors (see below), whose sum is σ = 1165992. Its totient is φ = 736128.

The previous prime is 945899. The next prime is 945907. The reversal of 945905 is 509549.

It can be written as a sum of positive squares in 4 ways, for example, as 39601 + 906304 = 199^2 + 952^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-945905 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 945905.

It is not an unprimeable number, because it can be changed into a prime (945907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372 + ... + 2741.

It is an arithmetic number, because the mean of its divisors is an integer number (145749).

2⁹⁴⁵⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

945905 is a deficient number, since it is larger than the sum of its proper divisors (220087).

945905 is a wasteful number, since it uses less digits than its factorization.

945905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5155.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 945905 is about 972.5764751422. The cubic root of 945905 is about 98.1633053957.

The spelling of 945905 in words is "nine hundred forty-five thousand, nine hundred five".