561140 has 12 divisors (see below), whose sum is σ = 1178436. Its totient is φ = 224448.

The previous prime is 561109. The next prime is 561161. The reversal of 561140 is 41165.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 252004 + 309136 = 502^2 + 556^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14009 + ... + 14048.

It is an arithmetic number, because the mean of its divisors is an integer number (98203).

2⁵⁶¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

561140 is an abundant number, since it is smaller than the sum of its proper divisors (617296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

561140 is a wasteful number, since it uses less digits than its factorization.

561140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28066 (or 28064 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 561140 is about 749.0927846402. The cubic root of 561140 is about 82.4815998144.

The spelling of 561140 in words is "five hundred sixty-one thousand, one hundred forty".