561013126 has 4 divisors (see below), whose sum is σ = 841519692. Its totient is φ = 280506562.

The previous prime is 561013111. The next prime is 561013139. The reversal of 561013126 is 621310165.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 561013126.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 140253280 + ... + 140253283.

It is an arithmetic number, because the mean of its divisors is an integer number (210379923).

Almost surely, 2^561013126 is an apocalyptic number.

561013126 is a deficient number, since it is larger than the sum of its proper divisors (280506566).

561013126 is a wasteful number, since it uses less digits than its factorization.

561013126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280506565.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 561013126 is about 23685.7156531104. The cubic root of 561013126 is about 824.7538297057.

The spelling of 561013126 in words is "five hundred sixty-one million, thirteen thousand, one hundred twenty-six".