1245131113 has 2 divisors, whose sum is σ = 1245131114. Its totient is φ = 1245131112.

The previous prime is 1245131099. The next prime is 1245131159. The reversal of 1245131113 is 3111315421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1058070784 + 187060329 = 32528^2 + 13677^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245131113 - 2¹⁷ = 1245000041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245131183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622565556 + 622565557.

It is an arithmetic number, because the mean of its divisors is an integer number (622565557).

Almost surely, 2^1245131113 is an apocalyptic number.

It is an amenable number.

1245131113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245131113 is an equidigital number, since it uses as much as digits as its factorization.

1245131113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 360, while the sum is 22.

The square root of 1245131113 is about 35286.4154172679. The cubic root of 1245131113 is about 1075.8168986009.

Adding to 1245131113 its reverse (3111315421), we get a palindrome (4356446534).

The spelling of 1245131113 in words is "one billion, two hundred forty-five million, one hundred thirty-one thousand, one hundred thirteen".