1040442505403 has 4 divisors (see below), whose sum is σ = 1189077149040. Its totient is φ = 891807861768.

The previous prime is 1040442505391. The next prime is 1040442505409. The reversal of 1040442505403 is 3045052440401.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1040442505403 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 1040442505403.

It is not an unprimeable number, because it can be changed into a prime (1040442505409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74317321808 + ... + 74317321821.

It is an arithmetic number, because the mean of its divisors is an integer number (297269287260).

Almost surely, 2^{1040442505403} is an apocalyptic number.

1040442505403 is a deficient number, since it is larger than the sum of its proper divisors (148634643637).

1040442505403 is an equidigital number, since it uses as much as digits as its factorization.

1040442505403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148634643636.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 1040442505403 its reverse (3045052440401), we get a palindrome (4085494945804).

The spelling of 1040442505403 in words is "one trillion, forty billion, four hundred forty-two million, five hundred five thousand, four hundred three".