1042020402403 has 4 divisors (see below), whose sum is σ = 1042257391200. Its totient is φ = 1041783413608.

The previous prime is 1042020402343. The next prime is 1042020402407. The reversal of 1042020402403 is 3042040202401.

It is a happy number.

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-1042020402403 is a prime.

It is a super-2 number, since 2×1042020402403² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042020402407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118487803 + ... + 118496596.

It is an arithmetic number, because the mean of its divisors is an integer number (260564347800).

Almost surely, 2^{1042020402403} is an apocalyptic number.

1042020402403 is a deficient number, since it is larger than the sum of its proper divisors (236988797).

1042020402403 is an equidigital number, since it uses as much as digits as its factorization.

1042020402403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236988796.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 1042020402403 its reverse (3042040202401), we get a palindrome (4084060604804).

The spelling of 1042020402403 in words is "one trillion, forty-two billion, twenty million, four hundred two thousand, four hundred three".