561251146 has 16 divisors (see below), whose sum is σ = 896868000. Its totient is φ = 262651248.

The previous prime is 561251143. The next prime is 561251147. The reversal of 561251146 is 641152165.

It is not an unprimeable number, because it can be changed into a prime (561251143) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 85821 + ... + 92128.

It is an arithmetic number, because the mean of its divisors is an integer number (56054250).

Almost surely, 2^561251146 is an apocalyptic number.

561251146 is a deficient number, since it is larger than the sum of its proper divisors (335616854).

561251146 is a wasteful number, since it uses less digits than its factorization.

561251146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178053.

The product of its digits is 7200, while the sum is 31.

The square root of 561251146 is about 23690.7396676423. The cubic root of 561251146 is about 824.8704521409.

The spelling of 561251146 in words is "five hundred sixty-one million, two hundred fifty-one thousand, one hundred forty-six".