1241253511 has 2 divisors, whose sum is σ = 1241253512. Its totient is φ = 1241253510.

The previous prime is 1241253499. The next prime is 1241253569. The reversal of 1241253511 is 1153521421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1241253511 - 2²³ = 1232864903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1241250511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620626755 + 620626756.

It is an arithmetic number, because the mean of its divisors is an integer number (620626756).

Almost surely, 2^1241253511 is an apocalyptic number.

1241253511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241253511 is an equidigital number, since it uses as much as digits as its factorization.

1241253511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 1241253511 is about 35231.4278876119. The cubic root of 1241253511 is about 1074.6989634088.

Adding to 1241253511 its reverse (1153521421), we get a palindrome (2394774932).

The spelling of 1241253511 in words is "one billion, two hundred forty-one million, two hundred fifty-three thousand, five hundred eleven".