1040661 has 8 divisors (see below), whose sum is σ = 1541760. Its totient is φ = 693756.

The previous prime is 1040659. The next prime is 1040671. The reversal of 1040661 is 1660401.

1040661 is a `hidden beast` number, since 1 + 0 + 4 + 0 + 661 = 666.

It is not a de Polignac number, because 1040661 - 2¹ = 1040659 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 19245 + ... + 19298.

It is an arithmetic number, because the mean of its divisors is an integer number (192720).

2^1040661 is an apocalyptic number.

It is an amenable number.

1040661 is a deficient number, since it is larger than the sum of its proper divisors (501099).

1040661 is an equidigital number, since it uses as much as digits as its factorization.

1040661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38552 (or 38546 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1040661 is about 1020.1279331535. The cubic root of 1040661 is about 101.3374005274.

The spelling of 1040661 in words is "one million, forty thousand, six hundred sixty-one".