1251275001166 has 8 divisors (see below), whose sum is σ = 1876917289680. Its totient is φ = 625635904608.

The previous prime is 1251275001149. The next prime is 1251275001167. The reversal of 1251275001166 is 6611005721521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1251275001167) 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, 933030 + ... + 1836598.

It is an arithmetic number, because the mean of its divisors is an integer number (234614661210).

Almost surely, 2^{1251275001166} is an apocalyptic number.

1251275001166 is a deficient number, since it is larger than the sum of its proper divisors (625642288514).

1251275001166 is an equidigital number, since it uses as much as digits as its factorization.

1251275001166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595978.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 1251275001166 in words is "one trillion, two hundred fifty-one billion, two hundred seventy-five million, one thousand, one hundred sixty-six".