1017980 has 24 divisors (see below), whose sum is σ = 2231712. Its totient is φ = 389312.

The previous prime is 1017959. The next prime is 1017997. The reversal of 1017980 is 897101.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 647 + ... + 1566.

It is an arithmetic number, because the mean of its divisors is an integer number (92988).

2^1017980 is an apocalyptic number.

1017980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1017980 is an abundant number, since it is smaller than the sum of its proper divisors (1213732).

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

1017980 is a wasteful number, since it uses less digits than its factorization.

1017980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2245 (or 2243 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 26.

The square root of 1017980 is about 1008.9499492046. The cubic root of 1017980 is about 100.5957767845.

The spelling of 1017980 in words is "one million, seventeen thousand, nine hundred eighty".