1249163999 has 16 divisors (see below), whose sum is σ = 1277337600. Its totient is φ = 1221444000.

The previous prime is 1249163983. The next prime is 1249164011. The reversal of 1249163999 is 9993619421.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1249163999 - 2⁴ = 1249163983 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1249163999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249163969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4749542 + ... + 4749804.

It is an arithmetic number, because the mean of its divisors is an integer number (79833600).

Almost surely, 2^1249163999 is an apocalyptic number.

1249163999 is a deficient number, since it is larger than the sum of its proper divisors (28173601).

1249163999 is a wasteful number, since it uses less digits than its factorization.

1249163999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790.

The product of its digits is 944784, while the sum is 53.

The square root of 1249163999 is about 35343.5142423614. The cubic root of 1249163999 is about 1076.9771435183.

The spelling of 1249163999 in words is "one billion, two hundred forty-nine million, one hundred sixty-three thousand, nine hundred ninety-nine".