557261 has 2 divisors, whose sum is σ = 557262. Its totient is φ = 557260.

The previous prime is 557201. The next prime is 557269. The reversal of 557261 is 162755.

557261 is nontrivially palindromic in base 5.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 481636 + 75625 = 694^2 + 275^2 .

It is a cyclic number.

It is not a de Polignac number, because 557261 - 2⁶ = 557197 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 557261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (557269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278630 + 278631.

It is an arithmetic number, because the mean of its divisors is an integer number (278631).

2⁵⁵⁷²⁶¹ is an apocalyptic number.

It is an amenable number.

557261 is a deficient number, since it is larger than the sum of its proper divisors (1).

557261 is an equidigital number, since it uses as much as digits as its factorization.

557261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2100, while the sum is 26.

The square root of 557261 is about 746.4991627591. The cubic root of 557261 is about 82.2911029675.

It can be divided in two parts, 557 and 261, that added together give a palindrome (818).

The spelling of 557261 in words is "five hundred fifty-seven thousand, two hundred sixty-one".