561275506 has 8 divisors (see below), whose sum is σ = 918450864. Its totient is φ = 255125220.

The previous prime is 561275501. The next prime is 561275521. The reversal of 561275506 is 605572165.

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

It is not an unprimeable number, because it can be changed into a prime (561275501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12756240 + ... + 12756283.

It is an arithmetic number, because the mean of its divisors is an integer number (114806358).

Almost surely, 2^561275506 is an apocalyptic number.

561275506 is a deficient number, since it is larger than the sum of its proper divisors (357175358).

561275506 is a wasteful number, since it uses less digits than its factorization.

561275506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25512536.

The product of its (nonzero) digits is 63000, while the sum is 37.

The square root of 561275506 is about 23691.2537869991. The cubic root of 561275506 is about 824.8823859270.

It can be divided in two parts, 5612 and 75506, that added together give a palindrome (81118).

The spelling of 561275506 in words is "five hundred sixty-one million, two hundred seventy-five thousand, five hundred six".