1249921163 has 2 divisors, whose sum is σ = 1249921164. Its totient is φ = 1249921162.

The previous prime is 1249921151. The next prime is 1249921181. The reversal of 1249921163 is 3611299421.

It is a weak prime.

It is an emirp because it is prime and its reverse (3611299421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249921163 - 2⁸ = 1249920907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1249921103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624960581 + 624960582.

It is an arithmetic number, because the mean of its divisors is an integer number (624960582).

Almost surely, 2^1249921163 is an apocalyptic number.

1249921163 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249921163 is an equidigital number, since it uses as much as digits as its factorization.

1249921163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 38.

The square root of 1249921163 is about 35354.2241182012. The cubic root of 1249921163 is about 1077.1946979841.

The spelling of 1249921163 in words is "one billion, two hundred forty-nine million, nine hundred twenty-one thousand, one hundred sixty-three".