1040645 has 4 divisors (see below), whose sum is σ = 1248780. Its totient is φ = 832512.

The previous prime is 1040629. The next prime is 1040651. The reversal of 1040645 is 5460401.

It is a happy number.

1040645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5460401 = 79 ⋅69119.

It can be written as a sum of positive squares in 2 ways, for example, as 160801 + 879844 = 401^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040645 - 2⁴ = 1040629 is a prime.

It is a Curzon 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, 104060 + ... + 104069.

It is an arithmetic number, because the mean of its divisors is an integer number (312195).

2^1040645 is an apocalyptic number.

It is an amenable number.

1040645 is a deficient number, since it is larger than the sum of its proper divisors (208135).

1040645 is an equidigital number, since it uses as much as digits as its factorization.

1040645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208134.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1040645 is about 1020.1200909697. The cubic root of 1040645 is about 101.3368811758.

The spelling of 1040645 in words is "one million, forty thousand, six hundred forty-five".