1251250138843 has 2 divisors, whose sum is σ = 1251250138844. Its totient is φ = 1251250138842.

The previous prime is 1251250138751. The next prime is 1251250138847. The reversal of 1251250138843 is 3488310521521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1251250138843 - 2¹⁷ = 1251250007771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1251250138843.

It is not a weakly prime, because it can be changed into another prime (1251250138847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625625069421 + 625625069422.

It is an arithmetic number, because the mean of its divisors is an integer number (625625069422).

Almost surely, 2^{1251250138843} is an apocalyptic number.

1251250138843 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251250138843 is an equidigital number, since it uses as much as digits as its factorization.

1251250138843 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 43.

The spelling of 1251250138843 in words is "one trillion, two hundred fifty-one billion, two hundred fifty million, one hundred thirty-eight thousand, eight hundred forty-three".