900845 has 12 divisors (see below), whose sum is σ = 1189020. Its totient is φ = 654720.

The previous prime is 900821. The next prime is 900863. The reversal of 900845 is 548009.

It can be written as a sum of positive squares in 2 ways, for example, as 256036 + 644809 = 506^2 + 803^2 .

It is not a de Polignac number, because 900845 - 2⁸ = 900589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140 + ... + 1349.

It is an arithmetic number, because the mean of its divisors is an integer number (99085).

2⁹⁰⁰⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

900845 is a deficient number, since it is larger than the sum of its proper divisors (288175).

900845 is a wasteful number, since it uses less digits than its factorization.

900845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1505 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 900845 is about 949.1285476689. The cubic root of 900845 is about 96.5791452508.

Subtracting from 900845 its reverse (548009), we obtain a square (352836 = 594²).

The spelling of 900845 in words is "nine hundred thousand, eight hundred forty-five".