561740 has 12 divisors (see below), whose sum is σ = 1179696. Its totient is φ = 224688.

The previous prime is 561733. The next prime is 561761. The reversal of 561740 is 47165.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 561740.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14024 + ... + 14063.

It is an arithmetic number, because the mean of its divisors is an integer number (98308).

2⁵⁶¹⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

561740 is an abundant number, since it is smaller than the sum of its proper divisors (617956).

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

561740 is a wasteful number, since it uses less digits than its factorization.

561740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28096 (or 28094 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 561740 is about 749.4931620769. The cubic root of 561740 is about 82.5109872113.

The spelling of 561740 in words is "five hundred sixty-one thousand, seven hundred forty".