561456 has 60 divisors (see below), whose sum is σ = 1798992. Its totient is φ = 160128.

The previous prime is 561439. The next prime is 561461. The reversal of 561456 is 654165.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

561456 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 730 + ... + 1286.

2⁵⁶¹⁴⁵⁶ is an apocalyptic number.

561456 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 561456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (899496).

561456 is an abundant number, since it is smaller than the sum of its proper divisors (1237536).

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

561456 is a wasteful number, since it uses less digits than its factorization.

561456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578 (or 569 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 561456 is about 749.3036767560. The cubic root of 561456 is about 82.4970797864.

The spelling of 561456 in words is "five hundred sixty-one thousand, four hundred fifty-six".