1042505 has 4 divisors (see below), whose sum is σ = 1251012. Its totient is φ = 834000.

The previous prime is 1042487. The next prime is 1042519. The reversal of 1042505 is 5052401.

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 383161 + 659344 = 619^2 + 812^2 .

It is not a de Polignac number, because 1042505 - 2¹² = 1038409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104246 + ... + 104255.

It is an arithmetic number, because the mean of its divisors is an integer number (312753).

2^1042505 is an apocalyptic number.

It is an amenable number.

1042505 is a deficient number, since it is larger than the sum of its proper divisors (208507).

1042505 is an equidigital number, since it uses as much as digits as its factorization.

1042505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208506.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 1042505 is about 1021.0313413407. The cubic root of 1042505 is about 101.3972201684.

Adding to 1042505 its reverse (5052401), we get a palindrome (6094906).

The spelling of 1042505 in words is "one million, forty-two thousand, five hundred five".