1042405505 has 4 divisors (see below), whose sum is σ = 1250886612. Its totient is φ = 833924400.

The previous prime is 1042405501. The next prime is 1042405543. The reversal of 1042405505 is 5055042401.

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

It can be written as a sum of positive squares in 2 ways, for example, as 405297424 + 637108081 = 20132^2 + 25241^2 .

It is not a de Polignac number, because 1042405505 - 2² = 1042405501 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1042405501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104240546 + ... + 104240555.

It is an arithmetic number, because the mean of its divisors is an integer number (312721653).

Almost surely, 2^1042405505 is an apocalyptic number.

It is an amenable number.

1042405505 is a deficient number, since it is larger than the sum of its proper divisors (208481107).

1042405505 is an equidigital number, since it uses as much as digits as its factorization.

1042405505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208481106.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 1042405505 is about 32286.3052237322. The cubic root of 1042405505 is about 1013.9399433663.

Adding to 1042405505 its reverse (5055042401), we get a palindrome (6097447906).

The spelling of 1042405505 in words is "one billion, forty-two million, four hundred five thousand, five hundred five".