505045 has 4 divisors (see below), whose sum is σ = 606060. Its totient is φ = 404032.

The previous prime is 505033. The next prime is 505049. The reversal of 505045 is 540505.

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 86436 + 418609 = 294^2 + 647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505045 is a prime.

505045 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50500 + ... + 50509.

It is an arithmetic number, because the mean of its divisors is an integer number (151515).

2⁵⁰⁵⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

505045 is a deficient number, since it is larger than the sum of its proper divisors (101015).

505045 is a wasteful number, since it uses less digits than its factorization.

505045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101014.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 505045 is about 710.6651813618. The cubic root of 505045 is about 79.6361077063.

The spelling of 505045 in words is "five hundred five thousand, forty-five".