900851 has 4 divisors (see below), whose sum is σ = 1029552. Its totient is φ = 772152.

The previous prime is 900821. The next prime is 900863. The reversal of 900851 is 158009.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900851 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 900851.

It is not an unprimeable number, because it can be changed into a prime (900821) 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, 64340 + ... + 64353.

It is an arithmetic number, because the mean of its divisors is an integer number (257388).

2⁹⁰⁰⁸⁵¹ is an apocalyptic number.

900851 is a deficient number, since it is larger than the sum of its proper divisors (128701).

900851 is a wasteful number, since it uses less digits than its factorization.

900851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128700.

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 900851 is about 949.1317084578. The cubic root of 900851 is about 96.5793596693.

The spelling of 900851 in words is "nine hundred thousand, eight hundred fifty-one".