1040921 has 8 divisors (see below), whose sum is σ = 1222080. Its totient is φ = 867888.

The previous prime is 1040899. The next prime is 1040929. The reversal of 1040921 is 1290401.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1040921 - 2⁶ = 1040857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1040921.

It is not an unprimeable number, because it can be changed into a prime (1040929) 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, 1751 + ... + 2268.

It is an arithmetic number, because the mean of its divisors is an integer number (152760).

2^1040921 is an apocalyptic number.

It is an amenable number.

1040921 is a deficient number, since it is larger than the sum of its proper divisors (181159).

1040921 is an equidigital number, since it uses as much as digits as its factorization.

1040921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1040921 is about 1020.2553601918. The cubic root of 1040921 is about 101.3458392441.

The spelling of 1040921 in words is "one million, forty thousand, nine hundred twenty-one".