561126120 has 32 divisors (see below), whose sum is σ = 1683378720. Its totient is φ = 149633600.

The previous prime is 561126113. The next prime is 561126121. The reversal of 561126120 is 21621165.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (561126121) 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 7 ways as a sum of consecutive naturals, for example, 2337906 + ... + 2338145.

It is an arithmetic number, because the mean of its divisors is an integer number (52605585).

Almost surely, 2^561126120 is an apocalyptic number.

It is an amenable number.

561126120 is an abundant number, since it is smaller than the sum of its proper divisors (1122252600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561126120 is a wasteful number, since it uses less digits than its factorization.

561126120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676065 (or 4676061 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 561126120 is about 23688.1008103225. The cubic root of 561126120 is about 824.8091973813.

Adding to 561126120 its reverse (21621165), we get a palindrome (582747285).

The spelling of 561126120 in words is "five hundred sixty-one million, one hundred twenty-six thousand, one hundred twenty".