561277 has 2 divisors, whose sum is σ = 561278. Its totient is φ = 561276.

The previous prime is 561251. The next prime is 561307. The reversal of 561277 is 772165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 556516 + 4761 = 746^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 561277 - 2¹⁵ = 528509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280638 + 280639.

It is an arithmetic number, because the mean of its divisors is an integer number (280639).

2⁵⁶¹²⁷⁷ is an apocalyptic number.

It is an amenable number.

561277 is a deficient number, since it is larger than the sum of its proper divisors (1).

561277 is an equidigital number, since it uses as much as digits as its factorization.

561277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 28.

The square root of 561277 is about 749.1842230053. The cubic root of 561277 is about 82.4883117815.

It can be divided in two parts, 561 and 277, that added together give a palindrome (838).

The spelling of 561277 in words is "five hundred sixty-one thousand, two hundred seventy-seven".