1245357499 has 2 divisors, whose sum is σ = 1245357500. Its totient is φ = 1245357498.

The previous prime is 1245357479. The next prime is 1245357541. The reversal of 1245357499 is 9947535421.

It is a weak prime.

It is an emirp because it is prime and its reverse (9947535421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1245357499 - 2²⁵ = 1211803067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245357409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622678749 + 622678750.

It is an arithmetic number, because the mean of its divisors is an integer number (622678750).

Almost surely, 2^1245357499 is an apocalyptic number.

1245357499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245357499 is an equidigital number, since it uses as much as digits as its factorization.

1245357499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 49.

The square root of 1245357499 is about 35289.6231065167. The cubic root of 1245357499 is about 1075.8820952491.

The spelling of 1245357499 in words is "one billion, two hundred forty-five million, three hundred fifty-seven thousand, four hundred ninety-nine".