125121423 has 8 divisors (see below), whose sum is σ = 190661248. Its totient is φ = 71497944.

The previous prime is 125121419. The next prime is 125121433. The reversal of 125121423 is 324121521.

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

It is not a de Polignac number, because 125121423 - 2² = 125121419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 5958163 = 125121423 / (1 + 2 + 5 + 1 + 2 + 1 + 4 + 2 + 3).

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 125121423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125121433) 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, 2979061 + ... + 2979102.

It is an arithmetic number, because the mean of its divisors is an integer number (23832656).

Almost surely, 2^125121423 is an apocalyptic number.

125121423 is a deficient number, since it is larger than the sum of its proper divisors (65539825).

125121423 is an equidigital number, since it uses as much as digits as its factorization.

125121423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958173.

The product of its digits is 480, while the sum is 21.

The square root of 125121423 is about 11185.7687710769. The cubic root of 125121423 is about 500.1618449401.

Adding to 125121423 its reverse (324121521), we get a palindrome (449242944).

The spelling of 125121423 in words is "one hundred twenty-five million, one hundred twenty-one thousand, four hundred twenty-three".