125271666 has 24 divisors (see below), whose sum is σ = 292301100. Its totient is φ = 38545056.

The previous prime is 125271661. The next prime is 125271667. The reversal of 125271666 is 666172521.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 121550625 + 3721041 = 11025^2 + 1929^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125271666.

It is not an unprimeable number, because it can be changed into a prime (125271661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 267441 + ... + 267908.

Almost surely, 2^125271666 is an apocalyptic number.

125271666 is an abundant number, since it is smaller than the sum of its proper divisors (167029434).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125271666 is a wasteful number, since it uses less digits than its factorization.

125271666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535370 (or 535367 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 125271666 is about 11192.4825664372. The cubic root of 125271666 is about 500.3619592411.

The spelling of 125271666 in words is "one hundred twenty-five million, two hundred seventy-one thousand, six hundred sixty-six".