561307 has 2 divisors, whose sum is σ = 561308.
Its totient is φ = 561306.
The previous prime is 561277. The next prime is 561313. The reversal of 561307 is 703165.
It can be divided in two parts, 561 and 307, that added together give a palindrome (868).
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 561307 - 211 = 559259 is a prime.
It is not a weakly prime, because it can be changed into another prime (561347) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280653 + 280654.
It is an arithmetic number, because the mean of its divisors is an integer number (280654).
2561307 is an apocalyptic number.
561307 is a deficient number, since it is larger than the sum of its proper divisors (1).
561307 is an equidigital number, since it uses as much as digits as its factorization.
561307 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 630, while the sum is 22.
The square root of 561307 is about 749.2042445155.
The cubic root of 561307 is about 82.4897814096.
The spelling of 561307 in words is "five hundred sixty-one thousand, three hundred seven".