1081620 has 48 divisors (see below), whose sum is σ = 3366720. Its totient is φ = 288288.
The previous prime is 1081583. The next prime is 1081631. The reversal of 1081620 is 261801.
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a junction number, because it is equal to n+sod(n) for n = 1081593 and 1081602.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 462 + ... + 1541.
It is an arithmetic number, because the mean of its divisors is an integer number (70140).
21081620 is an apocalyptic number.
1081620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
1081620 is an abundant number, since it is smaller than the sum of its proper divisors (2285100).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1081620 is a wasteful number, since it uses less digits than its factorization.
1081620 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2021 (or 2013 counting only the distinct ones).
The product of its (nonzero) digits is 96, while the sum is 18.
The square root of 1081620 is about 1040.0096153402. The cubic root of 1081620 is about 102.6498304507.
It can be divided in two parts, 108 and 1620, that added together give a cube (1728 = 123).
The spelling of 1081620 in words is "one million, eighty-one thousand, six hundred twenty".
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