80125981 has 8 divisors (see below), whose sum is σ = 91365624. Its totient is φ = 69611520.

The previous prime is 80125973. The next prime is 80125999. The reversal of 80125981 is 18952108.

It can be written as a sum of positive squares in 4 ways, for example, as 6937956 + 73188025 = 2634^2 + 8555^2 .

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 80125981 - 2³ = 80125973 is a prime.

It is a super-3 number, since 3×80125981³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80125901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181060 + ... + 181501.

It is an arithmetic number, because the mean of its divisors is an integer number (11420703).

Almost surely, 2^80125981 is an apocalyptic number.

It is an amenable number.

80125981 is a deficient number, since it is larger than the sum of its proper divisors (11239643).

80125981 is a wasteful number, since it uses less digits than its factorization.

80125981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362591.

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 80125981 is about 8951.3116915902. The cubic root of 80125981 is about 431.1130009133.

The spelling of 80125981 in words is "eighty million, one hundred twenty-five thousand, nine hundred eighty-one".