1245240377 has 2 divisors, whose sum is σ = 1245240378. Its totient is φ = 1245240376.

The previous prime is 1245240341. The next prime is 1245240379. The reversal of 1245240377 is 7730425421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1161719056 + 83521321 = 34084^2 + 9139^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245240377 - 2⁸ = 1245240121 is a prime.

It is a super-2 number, since 2×1245240377² = 3101247193022204258, which contains 22 as substring.

Together with 1245240379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1245240379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622620188 + 622620189.

It is an arithmetic number, because the mean of its divisors is an integer number (622620189).

Almost surely, 2^1245240377 is an apocalyptic number.

It is an amenable number.

1245240377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245240377 is an equidigital number, since it uses as much as digits as its factorization.

1245240377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 35.

The square root of 1245240377 is about 35287.9636278434. The cubic root of 1245240377 is about 1075.8483664033.

Adding to 1245240377 its reverse (7730425421), we get a palindrome (8975665798).

The spelling of 1245240377 in words is "one billion, two hundred forty-five million, two hundred forty thousand, three hundred seventy-seven".