2045421445 has 4 divisors (see below), whose sum is σ = 2454505740. Its totient is φ = 1636337152.

The previous prime is 2045421437. The next prime is 2045421479. The reversal of 2045421445 is 5441245402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5441245402 = 2 ⋅2720622701.

It can be written as a sum of positive squares in 2 ways, for example, as 596629476 + 1448791969 = 24426^2 + 38063^2 .

It is a cyclic number.

It is not a de Polignac number, because 2045421445 - 2³ = 2045421437 is a prime.

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, 204542140 + ... + 204542149.

It is an arithmetic number, because the mean of its divisors is an integer number (613626435).

Almost surely, 2^2045421445 is an apocalyptic number.

It is an amenable number.

2045421445 is a deficient number, since it is larger than the sum of its proper divisors (409084295).

2045421445 is an equidigital number, since it uses as much as digits as its factorization.

2045421445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409084294.

The product of its (nonzero) digits is 25600, while the sum is 31.

The square root of 2045421445 is about 45226.3357458904. The cubic root of 2045421445 is about 1269.3876488683.

Adding to 2045421445 its reverse (5441245402), we get a palindrome (7486666847).

The spelling of 2045421445 in words is "two billion, forty-five million, four hundred twenty-one thousand, four hundred forty-five".