905081 has 4 divisors (see below), whose sum is σ = 922212. Its totient is φ = 887952.

The previous prime is 905071. The next prime is 905083. The reversal of 905081 is 180509.

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

It can be written as a sum of positive squares in 2 ways, for example, as 525625 + 379456 = 725^2 + 616^2 .

It is a cyclic number.

It is not a de Polignac number, because 905081 - 2¹⁸ = 642937 is a prime.

It is a super-2 number, since 2×905081² = 1638343233122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (905083) 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, 8486 + ... + 8591.

It is an arithmetic number, because the mean of its divisors is an integer number (230553).

2⁹⁰⁵⁰⁸¹ is an apocalyptic number.

It is an amenable number.

905081 is a deficient number, since it is larger than the sum of its proper divisors (17131).

905081 is a wasteful number, since it uses less digits than its factorization.

905081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17130.

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

The square root of 905081 is about 951.3574512243. The cubic root of 905081 is about 96.7302884124.

It can be divided in two parts, 90508 and 1, that added together give a palindrome (90509).

The spelling of 905081 in words is "nine hundred five thousand, eighty-one".