45042005 has 8 divisors (see below), whose sum is σ = 54170424. Its totient is φ = 35953600.

The previous prime is 45042001. The next prime is 45042007. The reversal of 45042005 is 50024054.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 432964 + 44609041 = 658^2 + 6679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45042005 - 2² = 45042001 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 (45042001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7466 + ... + 12075.

It is an arithmetic number, because the mean of its divisors is an integer number (6771303).

Almost surely, 2^45042005 is an apocalyptic number.

It is an amenable number.

45042005 is a deficient number, since it is larger than the sum of its proper divisors (9128419).

45042005 is a wasteful number, since it uses less digits than its factorization.

45042005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20007.

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 45042005 is about 6711.3340700639. The cubic root of 45042005 is about 355.7999681079.

Adding to 45042005 its reverse (50024054), we get a palindrome (95066059).

The spelling of 45042005 in words is "forty-five million, forty-two thousand, five".