45090505 has 8 divisors (see below), whose sum is σ = 55974600. Its totient is φ = 34828416.

The previous prime is 45090491. The next prime is 45090517. The reversal of 45090505 is 50509054.

It can be written as a sum of positive squares in 4 ways, for example, as 6290064 + 38800441 = 2508^2 + 6229^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 45090505 - 2⁵ = 45090473 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155340 + ... + 155629.

It is an arithmetic number, because the mean of its divisors is an integer number (6996825).

Almost surely, 2^45090505 is an apocalyptic number.

It is an amenable number.

45090505 is a deficient number, since it is larger than the sum of its proper divisors (10884095).

45090505 is a wasteful number, since it uses less digits than its factorization.

45090505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311003.

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 45090505 is about 6714.9463884680. The cubic root of 45090505 is about 355.9276275261.

Adding to 45090505 its reverse (50509054), we get a palindrome (95599559).

The spelling of 45090505 in words is "forty-five million, ninety thousand, five hundred five".