126250271999 has 4 divisors (see below), whose sum is σ = 126537858480. Its totient is φ = 125962685520.

The previous prime is 126250271977. The next prime is 126250272019. The reversal of 126250271999 is 999172052621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999172052621 = 47 ⋅21258979843.

It is a cyclic number.

It is not a de Polignac number, because 126250271999 - 2¹⁶ = 126250206463 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 126250271999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126250271969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143792582 + ... + 143793459.

It is an arithmetic number, because the mean of its divisors is an integer number (31634464620).

Almost surely, 2^126250271999 is an apocalyptic number.

126250271999 is a deficient number, since it is larger than the sum of its proper divisors (287586481).

126250271999 is an equidigital number, since it uses as much as digits as its factorization.

126250271999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287586480.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The spelling of 126250271999 in words is "one hundred twenty-six billion, two hundred fifty million, two hundred seventy-one thousand, nine hundred ninety-nine".