1236141457 has 2 divisors, whose sum is σ = 1236141458. Its totient is φ = 1236141456.

The previous prime is 1236141449. The next prime is 1236141479. The reversal of 1236141457 is 7541416321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1115493201 + 120648256 = 33399^2 + 10984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236141457 - 2³ = 1236141449 is a prime.

It is not a weakly prime, because it can be changed into another prime (1236141437) 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, 618070728 + 618070729.

It is an arithmetic number, because the mean of its divisors is an integer number (618070729).

Almost surely, 2^1236141457 is an apocalyptic number.

It is an amenable number.

1236141457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236141457 is an equidigital number, since it uses as much as digits as its factorization.

1236141457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 34.

The square root of 1236141457 is about 35158.8034068283. The cubic root of 1236141457 is about 1073.2215648077.

Adding to 1236141457 its reverse (7541416321), we get a palindrome (8777557778).

The spelling of 1236141457 in words is "one billion, two hundred thirty-six million, one hundred forty-one thousand, four hundred fifty-seven".