561340 has 48 divisors (see below), whose sum is σ = 1354752. Its totient is φ = 193536.

The previous prime is 561313. The next prime is 561343. The reversal of 561340 is 43165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4357 + ... + 4483.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2⁵⁶¹³⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (677376).

561340 is an abundant number, since it is smaller than the sum of its proper divisors (793412).

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

561340 is a wasteful number, since it uses less digits than its factorization.

561340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 561340 is about 749.2262675587. The cubic root of 561340 is about 82.4913979400.

The spelling of 561340 in words is "five hundred sixty-one thousand, three hundred forty".