1011980 has 12 divisors (see below), whose sum is σ = 2125200. Its totient is φ = 404784.

The previous prime is 1011979. The next prime is 1012007. The reversal of 1011980 is 891101.

1011980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 50599 = 1011980 / (1 + 0 + 1 + 1 + 9 + 8 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25280 + ... + 25319.

It is an arithmetic number, because the mean of its divisors is an integer number (177100).

2^1011980 is an apocalyptic number.

1011980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1011980 is an abundant number, since it is smaller than the sum of its proper divisors (1113220).

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

1011980 is a wasteful number, since it uses less digits than its factorization.

1011980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50608 (or 50606 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 1011980 is about 1005.9721666130. The cubic root of 1011980 is about 100.3977491916.

It can be divided in two parts, 1011 and 980, that added together give a palindrome (1991).

The spelling of 1011980 in words is "one million, eleven thousand, nine hundred eighty".