125621166 has 32 divisors (see below), whose sum is σ = 275787648. Its totient is φ = 37830240.

The previous prime is 125621149. The next prime is 125621173. The reversal of 125621166 is 661126521.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4920 + ... + 16596.

It is an arithmetic number, because the mean of its divisors is an integer number (8618364).

Almost surely, 2^125621166 is an apocalyptic number.

125621166 is an abundant number, since it is smaller than the sum of its proper divisors (150166482).

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

125621166 is a wasteful number, since it uses less digits than its factorization.

125621166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11856.

The product of its digits is 4320, while the sum is 30.

The square root of 125621166 is about 11208.0848497859. The cubic root of 125621166 is about 500.8268532071.

Adding to 125621166 its reverse (661126521), we get a palindrome (786747687).

It can be divided in two parts, 1256 and 21166, that added together give a palindrome (22422).

The spelling of 125621166 in words is "one hundred twenty-five million, six hundred twenty-one thousand, one hundred sixty-six".