1045207109 has 4 divisors (see below), whose sum is σ = 1045286400. Its totient is φ = 1045127820.

The previous prime is 1045207099. The next prime is 1045207159. The reversal of 1045207109 is 9017025401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1045207109 - 2²⁴ = 1028429893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045207159) 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, 14597 + ... + 47994.

It is an arithmetic number, because the mean of its divisors is an integer number (261321600).

Almost surely, 2^1045207109 is an apocalyptic number.

It is an amenable number.

1045207109 is a deficient number, since it is larger than the sum of its proper divisors (79291).

1045207109 is an equidigital number, since it uses as much as digits as its factorization.

1045207109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79290.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1045207109 is about 32329.6629892735. The cubic root of 1045207109 is about 1014.8474971278.

The spelling of 1045207109 in words is "one billion, forty-five million, two hundred seven thousand, one hundred nine".