1245755579 has 2 divisors, whose sum is σ = 1245755580. Its totient is φ = 1245755578.

The previous prime is 1245755569. The next prime is 1245755629. The reversal of 1245755579 is 9755575421.

It is an a-pointer prime, because the next prime (1245755629) can be obtained adding 1245755579 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1245755579 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1245755569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622877789 + 622877790.

It is an arithmetic number, because the mean of its divisors is an integer number (622877790).

Almost surely, 2^1245755579 is an apocalyptic number.

1245755579 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245755579 is an equidigital number, since it uses as much as digits as its factorization.

1245755579 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2205000, while the sum is 50.

The square root of 1245755579 is about 35295.2628407836. The cubic root of 1245755579 is about 1075.9967186990.

The spelling of 1245755579 in words is "one billion, two hundred forty-five million, seven hundred fifty-five thousand, five hundred seventy-nine".