57242849 has 2 divisors, whose sum is σ = 57242850. Its totient is φ = 57242848.

The previous prime is 57242821. The next prime is 57242981. The reversal of 57242849 is 94824275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44462224 + 12780625 = 6668^2 + 3575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57242849 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (57242819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28621424 + 28621425.

It is an arithmetic number, because the mean of its divisors is an integer number (28621425).

Almost surely, 2^57242849 is an apocalyptic number.

It is an amenable number.

57242849 is a deficient number, since it is larger than the sum of its proper divisors (1).

57242849 is an equidigital number, since it uses as much as digits as its factorization.

57242849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 57242849 is about 7565.9004090723. The cubic root of 57242849 is about 385.3958911902.

The spelling of 57242849 in words is "fifty-seven million, two hundred forty-two thousand, eight hundred forty-nine".