1040401243 has 8 divisors (see below), whose sum is σ = 1189283040. Its totient is φ = 891582720.

The previous prime is 1040401237. The next prime is 1040401247. The reversal of 1040401243 is 3421040401.

1040401243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-1040401243 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 1040401243.

It is not an unprimeable number, because it can be changed into a prime (1040401247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27243 + ... + 53131.

It is an arithmetic number, because the mean of its divisors is an integer number (148660380).

Almost surely, 2^1040401243 is an apocalyptic number.

1040401243 is a deficient number, since it is larger than the sum of its proper divisors (148881797).

1040401243 is an equidigital number, since it uses as much as digits as its factorization.

1040401243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31637.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1040401243 is about 32255.2514019035. The cubic root of 1040401243 is about 1013.2896829386.

Adding to 1040401243 its reverse (3421040401), we get a palindrome (4461441644).

The spelling of 1040401243 in words is "one billion, forty million, four hundred one thousand, two hundred forty-three".