125908643 has 4 divisors (see below), whose sum is σ = 143895600. Its totient is φ = 107921688.

The previous prime is 125908637. The next prime is 125908667. The reversal of 125908643 is 346809521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346809521 = 29 ⋅11958949.

It is not a de Polignac number, because 125908643 - 2¹⁰ = 125907619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125908597 and 125908606.

It is not an unprimeable number, because it can be changed into a prime (125908043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8993468 + ... + 8993481.

It is an arithmetic number, because the mean of its divisors is an integer number (35973900).

Almost surely, 2^125908643 is an apocalyptic number.

125908643 is a deficient number, since it is larger than the sum of its proper divisors (17986957).

125908643 is an equidigital number, since it uses as much as digits as its factorization.

125908643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17986956.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 125908643 is about 11220.9020582126. The cubic root of 125908643 is about 501.2086002171.

The spelling of 125908643 in words is "one hundred twenty-five million, nine hundred eight thousand, six hundred forty-three".