1040440121 has 16 divisors (see below), whose sum is σ = 1250270208. Its totient is φ = 846502800.

The previous prime is 1040440117. The next prime is 1040440147. The reversal of 1040440121 is 1210440401.

It is a cyclic number.

It is not a de Polignac number, because 1040440121 - 2² = 1040440117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1040440121.

It is not an unprimeable number, because it can be changed into a prime (1040440151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3575 + ... + 45756.

It is an arithmetic number, because the mean of its divisors is an integer number (78141888).

Almost surely, 2^1040440121 is an apocalyptic number.

It is an amenable number.

1040440121 is a deficient number, since it is larger than the sum of its proper divisors (209830087).

1040440121 is a wasteful number, since it uses less digits than its factorization.

1040440121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49492.

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

The square root of 1040440121 is about 32255.8540578296. The cubic root of 1040440121 is about 1013.3023044107.

Adding to 1040440121 its reverse (1210440401), we get a palindrome (2250880522).

The spelling of 1040440121 in words is "one billion, forty million, four hundred forty thousand, one hundred twenty-one".