1081780 has 24 divisors (see below), whose sum is σ = 2596608. Its totient is φ = 370848.

The previous prime is 1081777. The next prime is 1081781. The reversal of 1081780 is 871801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081781) 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, 3724 + ... + 4003.

It is an arithmetic number, because the mean of its divisors is an integer number (108192).

2^1081780 is an apocalyptic number.

1081780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1081780 is an abundant number, since it is smaller than the sum of its proper divisors (1514828).

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

1081780 is a wasteful number, since it uses less digits than its factorization.

1081780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7743 (or 7741 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 1081780 is about 1040.0865348614. The cubic root of 1081780 is about 102.6548917363.

The spelling of 1081780 in words is "one million, eighty-one thousand, seven hundred eighty".