1245137911 has 2 divisors, whose sum is σ = 1245137912. Its totient is φ = 1245137910.

The previous prime is 1245137893. The next prime is 1245137969. The reversal of 1245137911 is 1197315421.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1245137911 - 2⁵ = 1245137879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1245134911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622568955 + 622568956.

It is an arithmetic number, because the mean of its divisors is an integer number (622568956).

Almost surely, 2^1245137911 is an apocalyptic number.

1245137911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245137911 is an equidigital number, since it uses as much as digits as its factorization.

1245137911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7560, while the sum is 34.

The square root of 1245137911 is about 35286.5117431576. The cubic root of 1245137911 is about 1075.8188564644.

The spelling of 1245137911 in words is "one billion, two hundred forty-five million, one hundred thirty-seven thousand, nine hundred eleven".