981020 has 24 divisors (see below), whose sum is σ = 2079168. Its totient is φ = 388800.

The previous prime is 981017. The next prime is 981023. The reversal of 981020 is 20189.

It is an interprime number because it is at equal distance from previous prime (981017) and next prime (981023).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 980983 and 981001.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 981020.

It is not an unprimeable number, because it can be changed into a prime (981023) by changing a digit.

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, 3485 + ... + 3755.

It is an arithmetic number, because the mean of its divisors is an integer number (86632).

2⁹⁸¹⁰²⁰ is an apocalyptic number.

It is an amenable number.

981020 is an abundant number, since it is smaller than the sum of its proper divisors (1098148).

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

981020 is a wasteful number, since it uses less digits than its factorization.

981020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 981020 is about 990.4645374772. The cubic root of 981020 is about 99.3632879147.

The spelling of 981020 in words is "nine hundred eighty-one thousand, twenty".