1081580 has 24 divisors (see below), whose sum is σ = 2328480. Its totient is φ = 421760.

The previous prime is 1081541. The next prime is 1081583. The reversal of 1081580 is 851801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081583) 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 7 ways as a sum of consecutive naturals, for example, 161 + ... + 1479.

It is an arithmetic number, because the mean of its divisors is an integer number (97020).

2^1081580 is an apocalyptic number.

1081580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1164240).

1081580 is an abundant number, since it is smaller than the sum of its proper divisors (1246900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1081580 is a wasteful number, since it uses less digits than its factorization.

1081580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369 (or 1367 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 1081580 is about 1039.9903845709. The cubic root of 1081580 is about 102.6485650513.

It can be divided in two parts, 1081 and 580, that added together give a palindrome (1661).

The spelling of 1081580 in words is "one million, eighty-one thousand, five hundred eighty".