1040305445 has 4 divisors (see below), whose sum is σ = 1248366540. Its totient is φ = 832244352.

The previous prime is 1040305439. The next prime is 1040305447. The reversal of 1040305445 is 5445030401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5445030401 = 29 ⋅187759669.

It can be written as a sum of positive squares in 2 ways, for example, as 599221441 + 441084004 = 24479^2 + 21002^2 .

It is a cyclic number.

It is not a de Polignac number, because 1040305445 - 2⁶ = 1040305381 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1040305447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104030540 + ... + 104030549.

It is an arithmetic number, because the mean of its divisors is an integer number (312091635).

Almost surely, 2^1040305445 is an apocalyptic number.

It is an amenable number.

1040305445 is a deficient number, since it is larger than the sum of its proper divisors (208061095).

1040305445 is an equidigital number, since it uses as much as digits as its factorization.

1040305445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208061094.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 1040305445 is about 32253.7663692165. The cubic root of 1040305445 is about 1013.2585814429.

Adding to 1040305445 its reverse (5445030401), we get a palindrome (6485335846).

The spelling of 1040305445 in words is "one billion, forty million, three hundred five thousand, four hundred forty-five".