561339249 has 8 divisors (see below), whose sum is σ = 787844640. Its totient is φ = 354530016.

The previous prime is 561339239. The next prime is 561339293. The reversal of 561339249 is 942933165.

It is a happy number.

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

It is not a de Polignac number, because 561339249 - 2⁹ = 561338737 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 561339249.

It is not an unprimeable number, because it can be changed into a prime (561339239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4923972 + ... + 4924085.

It is an arithmetic number, because the mean of its divisors is an integer number (98480580).

Almost surely, 2^561339249 is an apocalyptic number.

It is an amenable number.

561339249 is a deficient number, since it is larger than the sum of its proper divisors (226505391).

561339249 is a wasteful number, since it uses less digits than its factorization.

561339249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9848079.

The product of its digits is 174960, while the sum is 42.

The square root of 561339249 is about 23692.5990342976. The cubic root of 561339249 is about 824.9136115236.

The spelling of 561339249 in words is "five hundred sixty-one million, three hundred thirty-nine thousand, two hundred forty-nine".