120557 has 2 divisors, whose sum is σ = 120558. Its totient is φ = 120556.

The previous prime is 120551. The next prime is 120563. The reversal of 120557 is 755021.

120557 is nontrivially palindromic in base 3 and base 14.

It is a balanced prime because it is at equal distance from previous prime (120551) and next prime (120563).

It can be written as a sum of positive squares in only one way, i.e., 119716 + 841 = 346^2 + 29^2 .

It is a cyclic number.

It is not a de Polignac number, because 120557 - 2¹⁰ = 119533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120551) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60278 + 60279.

It is an arithmetic number, because the mean of its divisors is an integer number (60279).

2¹²⁰⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

120557 is a deficient number, since it is larger than the sum of its proper divisors (1).

120557 is an equidigital number, since it uses as much as digits as its factorization.

120557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 120557 is about 347.2131909937. The cubic root of 120557 is about 49.4004392755.

Adding to 120557 its reverse (755021), we get a palindrome (875578).

The spelling of 120557 in words is "one hundred twenty thousand, five hundred fifty-seven".