1251344099 has 2 divisors, whose sum is σ = 1251344100. Its totient is φ = 1251344098.

The previous prime is 1251344077. The next prime is 1251344137. The reversal of 1251344099 is 9904431521.

It is an a-pointer prime, because the next prime (1251344137) can be obtained adding 1251344099 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1251344099 - 2¹² = 1251340003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1251344069) 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 as a sum of consecutive naturals, namely, 625672049 + 625672050.

It is an arithmetic number, because the mean of its divisors is an integer number (625672050).

Almost surely, 2^1251344099 is an apocalyptic number.

1251344099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251344099 is an equidigital number, since it uses as much as digits as its factorization.

1251344099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1251344099 is about 35374.3423825801. The cubic root of 1251344099 is about 1077.6033098440.

The spelling of 1251344099 in words is "one billion, two hundred fifty-one million, three hundred forty-four thousand, ninety-nine".