1081646 has 4 divisors (see below), whose sum is σ = 1622472. Its totient is φ = 540822.

The previous prime is 1081637. The next prime is 1081657. The reversal of 1081646 is 6461801.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 270410 + ... + 270413.

It is an arithmetic number, because the mean of its divisors is an integer number (405618).

2^1081646 is an apocalyptic number.

1081646 is a deficient number, since it is larger than the sum of its proper divisors (540826).

1081646 is an equidigital number, since it uses as much as digits as its factorization.

1081646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540825.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 1081646 is about 1040.0221151495. The cubic root of 1081646 is about 102.6506529436.

The spelling of 1081646 in words is "one million, eighty-one thousand, six hundred forty-six".