125840165 has 8 divisors (see below), whose sum is σ = 164736288. Its totient is φ = 91520080.

The previous prime is 125840131. The next prime is 125840177. The reversal of 125840165 is 561048521.

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

It is not a de Polignac number, because 125840165 - 2²² = 121645861 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143947 + ... + 1144056.

It is an arithmetic number, because the mean of its divisors is an integer number (20592036).

Almost surely, 2^125840165 is an apocalyptic number.

It is an amenable number.

125840165 is a deficient number, since it is larger than the sum of its proper divisors (38896123).

125840165 is a wasteful number, since it uses less digits than its factorization.

125840165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2288019.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 125840165 is about 11217.8502842568. The cubic root of 125840165 is about 501.1177195442.

Adding to 125840165 its reverse (561048521), we get a palindrome (686888686).

The spelling of 125840165 in words is "one hundred twenty-five million, eight hundred forty thousand, one hundred sixty-five".