1042005123 has 24 divisors (see below), whose sum is σ = 1602907488. Its totient is φ = 650011392.

The previous prime is 1042005121. The next prime is 1042005169. The reversal of 1042005123 is 3215002401.

It is not a de Polignac number, because 1042005123 - 2¹ = 1042005121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1042005096 and 1042005105.

It is not an unprimeable number, because it can be changed into a prime (1042005121) 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 23 ways as a sum of consecutive naturals, for example, 6786 + ... + 46152.

It is an arithmetic number, because the mean of its divisors is an integer number (66787812).

Almost surely, 2^1042005123 is an apocalyptic number.

1042005123 is a deficient number, since it is larger than the sum of its proper divisors (560902365).

1042005123 is a wasteful number, since it uses less digits than its factorization.

1042005123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39563 (or 39560 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1042005123 is about 32280.1041355198. The cubic root of 1042005123 is about 1013.8101105621.

Adding to 1042005123 its reverse (3215002401), we get a palindrome (4257007524).

The spelling of 1042005123 in words is "one billion, forty-two million, five thousand, one hundred twenty-three".