1241210557 has 2 divisors, whose sum is σ = 1241210558. Its totient is φ = 1241210556.

The previous prime is 1241210539. The next prime is 1241210563. The reversal of 1241210557 is 7550121421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1182396996 + 58813561 = 34386^2 + 7669^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241210557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241210567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620605278 + 620605279.

It is an arithmetic number, because the mean of its divisors is an integer number (620605279).

Almost surely, 2^1241210557 is an apocalyptic number.

It is an amenable number.

1241210557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241210557 is an equidigital number, since it uses as much as digits as its factorization.

1241210557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 1241210557 is about 35230.8182845644. The cubic root of 1241210557 is about 1074.6865664914.

Adding to 1241210557 its reverse (7550121421), we get a palindrome (8791331978).

The spelling of 1241210557 in words is "one billion, two hundred forty-one million, two hundred ten thousand, five hundred fifty-seven".