1245917011 has 2 divisors, whose sum is σ = 1245917012. Its totient is φ = 1245917010.

The previous prime is 1245917003. The next prime is 1245917041. The reversal of 1245917011 is 1107195421.

It is a weak prime.

It is an emirp because it is prime and its reverse (1107195421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1245917011 - 2³ = 1245917003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245917041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622958505 + 622958506.

It is an arithmetic number, because the mean of its divisors is an integer number (622958506).

Almost surely, 2^1245917011 is an apocalyptic number.

1245917011 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245917011 is an equidigital number, since it uses as much as digits as its factorization.

1245917011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 1245917011 is about 35297.5496458324. The cubic root of 1245917011 is about 1076.0431945895.

The spelling of 1245917011 in words is "one billion, two hundred forty-five million, nine hundred seventeen thousand, eleven".