1040805 has 24 divisors (see below), whose sum is σ = 1829880. Its totient is φ = 547200.

The previous prime is 1040803. The next prime is 1040807. The reversal of 1040805 is 5080401.

It is an interprime number because it is at equal distance from previous prime (1040803) and next prime (1040807).

It can be written as a sum of positive squares in 4 ways, for example, as 613089 + 427716 = 783^2 + 654^2 .

It is not a de Polignac number, because 1040805 - 2¹ = 1040803 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4431 + ... + 4659.

It is an arithmetic number, because the mean of its divisors is an integer number (76245).

2^1040805 is an apocalyptic number.

1040805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1040805 is a deficient number, since it is larger than the sum of its proper divisors (789075).

1040805 is a wasteful number, since it uses less digits than its factorization.

1040805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1040805 is about 1020.1985100950. The cubic root of 1040805 is about 101.3420744518.

The spelling of 1040805 in words is "one million, forty thousand, eight hundred five".