57291121 has 2 divisors, whose sum is σ = 57291122. Its totient is φ = 57291120.

The previous prime is 57291109. The next prime is 57291149. The reversal of 57291121 is 12119275.

57291121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (57291149) can be obtained adding 57291121 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 4161600 = 7289^2 + 2040^2 .

It is a cyclic number.

It is not a de Polignac number, because 57291121 - 2⁷ = 57290993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57291121.

It is not a weakly prime, because it can be changed into another prime (57291151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28645560 + 28645561.

It is an arithmetic number, because the mean of its divisors is an integer number (28645561).

Almost surely, 2^57291121 is an apocalyptic number.

It is an amenable number.

57291121 is a deficient number, since it is larger than the sum of its proper divisors (1).

57291121 is an equidigital number, since it uses as much as digits as its factorization.

57291121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1260, while the sum is 28.

The square root of 57291121 is about 7569.0898396042. The cubic root of 57291121 is about 385.5041935301.

The spelling of 57291121 in words is "fifty-seven million, two hundred ninety-one thousand, one hundred twenty-one".