125166005 has 8 divisors (see below), whose sum is σ = 154258872. Its totient is φ = 97426368.

The previous prime is 125165959. The next prime is 125166043. The reversal of 125166005 is 500661521.

It can be written as a sum of positive squares in 4 ways, for example, as 41242084 + 83923921 = 6422^2 + 9161^2 .

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 125166005 - 2²² = 120971701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338102 + ... + 338471.

It is an arithmetic number, because the mean of its divisors is an integer number (19282359).

Almost surely, 2^125166005 is an apocalyptic number.

It is an amenable number.

125166005 is a deficient number, since it is larger than the sum of its proper divisors (29092867).

125166005 is an equidigital number, since it uses as much as digits as its factorization.

125166005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676615.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 125166005 is about 11187.7613935943. The cubic root of 125166005 is about 500.2212420894.

The spelling of 125166005 in words is "one hundred twenty-five million, one hundred sixty-six thousand, five".