561437 has 4 divisors (see below), whose sum is σ = 564540. Its totient is φ = 558336.

The previous prime is 561419. The next prime is 561439. The reversal of 561437 is 734165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 734165 = 5 ⋅146833.

It can be written as a sum of positive squares in 2 ways, for example, as 320356 + 241081 = 566^2 + 491^2 .

It is a cyclic number.

It is not a de Polignac number, because 561437 - 2⁶ = 561373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 561437.

It is not an unprimeable number, because it can be changed into a prime (561439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262 + ... + 1647.

It is an arithmetic number, because the mean of its divisors is an integer number (141135).

2⁵⁶¹⁴³⁷ is an apocalyptic number.

It is an amenable number.

561437 is a deficient number, since it is larger than the sum of its proper divisors (3103).

561437 is a wasteful number, since it uses less digits than its factorization.

561437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102.

The product of its digits is 2520, while the sum is 26.

The square root of 561437 is about 749.2909982110. The cubic root of 561437 is about 82.4961491928.

The spelling of 561437 in words is "five hundred sixty-one thousand, four hundred thirty-seven".