920081 has 4 divisors (see below), whose sum is σ = 942564. Its totient is φ = 897600.

The previous prime is 920053. The next prime is 920107. The reversal of 920081 is 180029.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180029 = 67 ⋅2687.

It can be written as a sum of positive squares in 2 ways, for example, as 36481 + 883600 = 191^2 + 940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-920081 is a prime.

It is a super-2 number, since 2×920081² = 1693098093122, which contains 22 as substring.

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 920081.

It is not an unprimeable number, because it can be changed into a prime (920011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11180 + ... + 11261.

It is an arithmetic number, because the mean of its divisors is an integer number (235641).

2⁹²⁰⁰⁸¹ is an apocalyptic number.

It is an amenable number.

920081 is a deficient number, since it is larger than the sum of its proper divisors (22483).

920081 is a wasteful number, since it uses less digits than its factorization.

920081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22482.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 920081 is about 959.2085279020. The cubic root of 920081 is about 97.2617368749.

The spelling of 920081 in words is "nine hundred twenty thousand, eighty-one".