1075820645 has 4 divisors (see below), whose sum is σ = 1290984780. Its totient is φ = 860656512.

The previous prime is 1075820611. The next prime is 1075820671. The reversal of 1075820645 is 5460285701.

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 818474881 + 257345764 = 28609^2 + 16042^2 .

It is a cyclic number.

It is not a de Polignac number, because 1075820645 - 2²⁴ = 1059043429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1075820599 and 1075820608.

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, 107582060 + ... + 107582069.

It is an arithmetic number, because the mean of its divisors is an integer number (322746195).

Almost surely, 2^1075820645 is an apocalyptic number.

It is an amenable number.

1075820645 is a deficient number, since it is larger than the sum of its proper divisors (215164135).

1075820645 is an equidigital number, since it uses as much as digits as its factorization.

1075820645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215164134.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 1075820645 is about 32799.7049529413. The cubic root of 1075820645 is about 1024.6604133835.

The spelling of 1075820645 in words is "one billion, seventy-five million, eight hundred twenty thousand, six hundred forty-five".