1045865 has 4 divisors (see below), whose sum is σ = 1255044. Its totient is φ = 836688.

The previous prime is 1045859. The next prime is 1045903. The reversal of 1045865 is 5685401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5685401 = 251 ⋅22651.

It can be written as a sum of positive squares in 2 ways, for example, as 802816 + 243049 = 896^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 1045865 - 2⁶ = 1045801 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104582 + ... + 104591.

It is an arithmetic number, because the mean of its divisors is an integer number (313761).

2^1045865 is an apocalyptic number.

It is an amenable number.

1045865 is a deficient number, since it is larger than the sum of its proper divisors (209179).

1045865 is an equidigital number, since it uses as much as digits as its factorization.

1045865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209178.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 1045865 is about 1022.6754128266. The cubic root of 1045865 is about 101.5060379658.

It can be divided in two parts, 104 and 5865, that multiplied together give a triangular number (609960 = T₁₁₀₄).

The spelling of 1045865 in words is "one million, forty-five thousand, eight hundred sixty-five".