2145302045 has 4 divisors (see below), whose sum is σ = 2574362460. Its totient is φ = 1716241632.

The previous prime is 2145302039. The next prime is 2145302053. The reversal of 2145302045 is 5402035412.

It is a happy number.

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 1149142201 + 996159844 = 33899^2 + 31562^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145302045 - 2¹⁰ = 2145301021 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, 214530200 + ... + 214530209.

It is an arithmetic number, because the mean of its divisors is an integer number (643590615).

Almost surely, 2^2145302045 is an apocalyptic number.

It is an amenable number.

2145302045 is a deficient number, since it is larger than the sum of its proper divisors (429060415).

2145302045 is an equidigital number, since it uses as much as digits as its factorization.

2145302045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429060414.

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

The square root of 2145302045 is about 46317.4054217202. The cubic root of 2145302045 is about 1289.7221213055.

Adding to 2145302045 its reverse (5402035412), we get a palindrome (7547337457).

The spelling of 2145302045 in words is "two billion, one hundred forty-five million, three hundred two thousand, forty-five".