561255146 has 16 divisors (see below), whose sum is σ = 865718280. Its totient is φ = 272701440.

The previous prime is 561255139. The next prime is 561255151. The reversal of 561255146 is 641552165.

It can be written as a sum of positive squares in 4 ways, for example, as 441462121 + 119793025 = 21011^2 + 10945^2 .

It is a super-2 number, since 2×561255146² = 630014677822962632, which contains 22 as substring.

It is an unprimeable number.

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, 60890 + ... + 69498.

Almost surely, 2^561255146 is an apocalyptic number.

561255146 is a deficient number, since it is larger than the sum of its proper divisors (304463134).

561255146 is a wasteful number, since it uses less digits than its factorization.

561255146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9529.

The product of its digits is 36000, while the sum is 35.

The square root of 561255146 is about 23690.8240886635. The cubic root of 561255146 is about 824.8724117354.

The spelling of 561255146 in words is "five hundred sixty-one million, two hundred fifty-five thousand, one hundred forty-six".