1081020 has 48 divisors (see below), whose sum is σ = 3104640. Its totient is φ = 280896.

The previous prime is 1080983. The next prime is 1081027. The reversal of 1081020 is 201801.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1080987 and 1081005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2371 + ... + 2789.

It is an arithmetic number, because the mean of its divisors is an integer number (64680).

2^1081020 is an apocalyptic number.

1081020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1081020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552320).

1081020 is an abundant number, since it is smaller than the sum of its proper divisors (2023620).

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

1081020 is a wasteful number, since it uses less digits than its factorization.

1081020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1081020 is about 1039.7211164538. The cubic root of 1081020 is about 102.6308461832.

Adding to 1081020 its reverse (201801), we get a palindrome (1282821).

It can be divided in two parts, 108 and 1020, that added together give a triangular number (1128 = T₄₇).

The spelling of 1081020 in words is "one million, eighty-one thousand, twenty".