1040840 has 16 divisors (see below), whose sum is σ = 2341980. Its totient is φ = 416320.

The previous prime is 1040833. The next prime is 1040857. The reversal of 1040840 is 480401.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 972196 + 68644 = 986^2 + 262^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12971 + ... + 13050.

2^1040840 is an apocalyptic number.

1040840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1040840 is an abundant number, since it is smaller than the sum of its proper divisors (1301140).

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

1040840 is a wasteful number, since it uses less digits than its factorization.

1040840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26032 (or 26028 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1040840 is about 1020.2156634751. The cubic root of 1040840 is about 101.3432104100.

The spelling of 1040840 in words is "one million, forty thousand, eight hundred forty".