1251498967 has 4 divisors (see below), whose sum is σ = 1259470456. Its totient is φ = 1243527480.

The previous prime is 1251498943. The next prime is 1251499003. The reversal of 1251498967 is 7698941521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1251498967 - 2¹¹ = 1251496919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251498067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3985509 + ... + 3985822.

It is an arithmetic number, because the mean of its divisors is an integer number (314867614).

Almost surely, 2^1251498967 is an apocalyptic number.

1251498967 is a deficient number, since it is larger than the sum of its proper divisors (7971489).

1251498967 is an equidigital number, since it uses as much as digits as its factorization.

1251498967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7971488.

The product of its digits is 1088640, while the sum is 52.

The square root of 1251498967 is about 35376.5313025458. The cubic root of 1251498967 is about 1077.6477632136.

The spelling of 1251498967 in words is "one billion, two hundred fifty-one million, four hundred ninety-eight thousand, nine hundred sixty-seven".