898581 has 4 divisors (see below), whose sum is σ = 1198112. Its totient is φ = 599052.

The previous prime is 898561. The next prime is 898607. The reversal of 898581 is 185898.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 898581 - 2⁵ = 898549 is a prime.

It is a super-2 number, since 2×898581² = 1614895627122, which contains 22 as substring.

It is a D-number.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

898581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (898561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149761 + ... + 149766.

It is an arithmetic number, because the mean of its divisors is an integer number (299528).

2⁸⁹⁸⁵⁸¹ is an apocalyptic number.

It is an amenable number.

898581 is a deficient number, since it is larger than the sum of its proper divisors (299531).

898581 is a wasteful number, since it uses less digits than its factorization.

898581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299530.

The product of its digits is 23040, while the sum is 39.

The square root of 898581 is about 947.9351243624. The cubic root of 898581 is about 96.4981699385.

It can be divided in two parts, 8 and 98581, that added together give a palindrome (98589).

The spelling of 898581 in words is "eight hundred ninety-eight thousand, five hundred eighty-one".