1042565 has 4 divisors (see below), whose sum is σ = 1251084. Its totient is φ = 834048.

The previous prime is 1042529. The next prime is 1042571. The reversal of 1042565 is 5652401.

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 454276 + 588289 = 674^2 + 767^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042565 - 2⁸ = 1042309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1042565.

It is a congruent 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, 104252 + ... + 104261.

It is an arithmetic number, because the mean of its divisors is an integer number (312771).

2^1042565 is an apocalyptic number.

It is an amenable number.

1042565 is a deficient number, since it is larger than the sum of its proper divisors (208519).

1042565 is an equidigital number, since it uses as much as digits as its factorization.

1042565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208518.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1042565 is about 1021.0607229739. The cubic root of 1042565 is about 101.3991653922.

Adding to 1042565 its reverse (5652401), we get a palindrome (6694966).

The spelling of 1042565 in words is "one million, forty-two thousand, five hundred sixty-five".