561908 has 6 divisors (see below), whose sum is σ = 983346. Its totient is φ = 280952.

The previous prime is 561907. The next prime is 561917. The reversal of 561908 is 809165.

It can be written as a sum of positive squares in only one way, i.e., 357604 + 204304 = 598^2 + 452^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70235 + ... + 70242.

It is an arithmetic number, because the mean of its divisors is an integer number (163891).

2⁵⁶¹⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

561908 is a deficient number, since it is larger than the sum of its proper divisors (421438).

561908 is a wasteful number, since it uses less digits than its factorization.

561908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140481 (or 140479 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 561908 is about 749.6052294375. The cubic root of 561908 is about 82.5192119322.

The spelling of 561908 in words is "five hundred sixty-one thousand, nine hundred eight".