920851 has 4 divisors (see below), whose sum is σ = 960912. Its totient is φ = 880792.

The previous prime is 920849. The next prime is 920863. The reversal of 920851 is 158029.

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

It is a cyclic number.

It is not a de Polignac number, because 920851 - 2¹ = 920849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (920891) 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, 19996 + ... + 20041.

It is an arithmetic number, because the mean of its divisors is an integer number (240228).

2⁹²⁰⁸⁵¹ is an apocalyptic number.

920851 is a deficient number, since it is larger than the sum of its proper divisors (40061).

920851 is a wasteful number, since it uses less digits than its factorization.

920851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40060.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 920851 is about 959.6098165400. The cubic root of 920851 is about 97.2888615358.

It can be divided in two parts, 920 and 851, that added together give a palindrome (1771).

The spelling of 920851 in words is "nine hundred twenty thousand, eight hundred fifty-one".