1081406 has 4 divisors (see below), whose sum is σ = 1622112. Its totient is φ = 540702.

The previous prime is 1081403. The next prime is 1081417. The reversal of 1081406 is 6041801.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081403) 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 as a sum of consecutive naturals, namely, 270350 + ... + 270353.

It is an arithmetic number, because the mean of its divisors is an integer number (405528).

2^1081406 is an apocalyptic number.

1081406 is a deficient number, since it is larger than the sum of its proper divisors (540706).

1081406 is an equidigital number, since it uses as much as digits as its factorization.

1081406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540705.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1081406 is about 1039.9067265866. The cubic root of 1081406 is about 102.6430602010.

The spelling of 1081406 in words is "one million, eighty-one thousand, four hundred six".