561242245 has 8 divisors (see below), whose sum is σ = 676382616. Its totient is φ = 447065856.

The previous prime is 561242237. The next prime is 561242299. The reversal of 561242245 is 542242165.

It can be written as a sum of positive squares in 4 ways, for example, as 41447844 + 519794401 = 6438^2 + 22799^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 561242245 - 2³ = 561242237 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 239712 + ... + 242041.

It is an arithmetic number, because the mean of its divisors is an integer number (84547827).

Almost surely, 2^561242245 is an apocalyptic number.

It is an amenable number.

561242245 is a deficient number, since it is larger than the sum of its proper divisors (115140371).

561242245 is a wasteful number, since it uses less digits than its factorization.

561242245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481991.

The product of its digits is 19200, while the sum is 31.

The square root of 561242245 is about 23690.5518086853. The cubic root of 561242245 is about 824.8660915198.

The spelling of 561242245 in words is "five hundred sixty-one million, two hundred forty-two thousand, two hundred forty-five".