1088581 has 4 divisors (see below), whose sum is σ = 1172332. Its totient is φ = 1004832.

The previous prime is 1088579. The next prime is 1088603. The reversal of 1088581 is 1858801.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1858801 = 7 ⋅265543.

It can be written as a sum of positive squares in 2 ways, for example, as 216225 + 872356 = 465^2 + 934^2 .

It is a cyclic number.

It is not a de Polignac number, because 1088581 - 2¹ = 1088579 is a prime.

It is a super-2 number, since 2×1088581² = 2370017187122, which contains 22 as substring.

It is a Duffinian number.

1088581 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1088081) 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, 41856 + ... + 41881.

It is an arithmetic number, because the mean of its divisors is an integer number (293083).

2^1088581 is an apocalyptic number.

It is an amenable number.

1088581 is a deficient number, since it is larger than the sum of its proper divisors (83751).

1088581 is an equidigital number, since it uses as much as digits as its factorization.

1088581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83750.

The product of its (nonzero) digits is 2560, while the sum is 31.

The square root of 1088581 is about 1043.3508518231. The cubic root of 1088581 is about 102.8695681455.

Subtracting from 1088581 its sum of digits (31), we obtain a triangular number (1088550 = T₁₄₇₅).

The spelling of 1088581 in words is "one million, eighty-eight thousand, five hundred eighty-one".