505242545 has 4 divisors (see below), whose sum is σ = 606291060. Its totient is φ = 404194032.

The previous prime is 505242427. The next prime is 505242571. The reversal of 505242545 is 545242505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545242505 = 5 ⋅109048501.

It can be written as a sum of positive squares in 2 ways, for example, as 231770176 + 273472369 = 15224^2 + 16537^2 .

It is a cyclic number.

It is not a de Polignac number, because 505242545 - 2²⁶ = 438133681 is a prime.

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, 50524250 + ... + 50524259.

It is an arithmetic number, because the mean of its divisors is an integer number (151572765).

Almost surely, 2^505242545 is an apocalyptic number.

It is an amenable number.

505242545 is a deficient number, since it is larger than the sum of its proper divisors (101048515).

505242545 is a wasteful number, since it uses less digits than its factorization.

505242545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101048514.

The product of its (nonzero) digits is 40000, while the sum is 32.

The square root of 505242545 is about 22477.6009618464. The cubic root of 505242545 is about 796.4648939787.

The spelling of 505242545 in words is "five hundred five million, two hundred forty-two thousand, five hundred forty-five".