503126561 has 6 divisors (see below), whose sum is σ = 585269730. Its totient is φ = 431251296.

The previous prime is 503126527. The next prime is 503126573. The reversal of 503126561 is 165621305.

It can be written as a sum of positive squares in only one way, i.e., 501760000 + 1366561 = 22400^2 + 1169^2 .

It is not a de Polignac number, because 503126561 - 2²² = 498932257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (503126521) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5133896 + ... + 5133993.

It is an arithmetic number, because the mean of its divisors is an integer number (97544955).

Almost surely, 2^503126561 is an apocalyptic number.

It is an amenable number.

503126561 is a deficient number, since it is larger than the sum of its proper divisors (82143169).

503126561 is a wasteful number, since it uses less digits than its factorization.

503126561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267903 (or 10267896 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 503126561 is about 22430.4828525826. The cubic root of 503126561 is about 795.3514583307.

Adding to 503126561 its reverse (165621305), we get a palindrome (668747866).

The spelling of 503126561 in words is "five hundred three million, one hundred twenty-six thousand, five hundred sixty-one".