1085980 has 24 divisors (see below), whose sum is σ = 2606688. Its totient is φ = 372288.

The previous prime is 1085971. The next prime is 1085989. The reversal of 1085980 is 895801.

1085980 = T₇₀ + T₇₁ + ... + T₁₈₉.

It is an interprime number because it is at equal distance from previous prime (1085971) and next prime (1085989).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1085989) 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, 3739 + ... + 4018.

It is an arithmetic number, because the mean of its divisors is an integer number (108612).

2^1085980 is an apocalyptic number.

1085980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1085980 is an abundant number, since it is smaller than the sum of its proper divisors (1520708).

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

1085980 is a wasteful number, since it uses less digits than its factorization.

1085980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7773 (or 7771 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1085980 is about 1042.1036416787. The cubic root of 1085980 is about 102.7875723696.

The spelling of 1085980 in words is "one million, eighty-five thousand, nine hundred eighty".