1250666161 has 8 divisors (see below), whose sum is σ = 1268374464. Its totient is φ = 1233020880.

The previous prime is 1250666159. The next prime is 1250666177. The reversal of 1250666161 is 1616660521.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1250666161 - 2¹ = 1250666159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1250666111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24951 + ... + 55891.

It is an arithmetic number, because the mean of its divisors is an integer number (158546808).

Almost surely, 2^1250666161 is an apocalyptic number.

It is an amenable number.

1250666161 is a deficient number, since it is larger than the sum of its proper divisors (17708303).

1250666161 is an equidigital number, since it uses as much as digits as its factorization.

1250666161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31511.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1250666161 is about 35364.7587436985. The cubic root of 1250666161 is about 1077.4086710812.

The spelling of 1250666161 in words is "one billion, two hundred fifty million, six hundred sixty-six thousand, one hundred sixty-one".