125140121 has 8 divisors (see below), whose sum is σ = 129164640. Its totient is φ = 121179168.

The previous prime is 125140109. The next prime is 125140123. The reversal of 125140121 is 121041521.

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 125140121 - 2¹⁰ = 125139097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125140121.

It is not an unprimeable number, because it can be changed into a prime (125140123) by changing a digit.

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, 11876 + ... + 19781.

It is an arithmetic number, because the mean of its divisors is an integer number (16145580).

Almost surely, 2^125140121 is an apocalyptic number.

It is an amenable number.

125140121 is a deficient number, since it is larger than the sum of its proper divisors (4024519).

125140121 is an equidigital number, since it uses as much as digits as its factorization.

125140121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31783.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 125140121 is about 11186.6045339951. The cubic root of 125140121 is about 500.1867582340.

Adding to 125140121 its reverse (121041521), we get a palindrome (246181642).

The spelling of 125140121 in words is "one hundred twenty-five million, one hundred forty thousand, one hundred twenty-one".