505045001 has 4 divisors (see below), whose sum is σ = 507158400. Its totient is φ = 502931604.

The previous prime is 505044989. The next prime is 505045031. The reversal of 505045001 is 100540505.

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.

It is a cyclic number.

It is not a de Polignac number, because 505045001 - 2⁶ = 505044937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505045031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056341 + ... + 1056818.

It is an arithmetic number, because the mean of its divisors is an integer number (126789600).

Almost surely, 2^505045001 is an apocalyptic number.

It is an amenable number.

505045001 is a deficient number, since it is larger than the sum of its proper divisors (2113399).

505045001 is a wasteful number, since it uses less digits than its factorization.

505045001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113398.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 505045001 is about 22473.2062910480. The cubic root of 505045001 is about 796.3610775888.

Adding to 505045001 its reverse (100540505), we get a palindrome (605585506).

The spelling of 505045001 in words is "five hundred five million, forty-five thousand, one".