125666841 has 4 divisors (see below), whose sum is σ = 167555792. Its totient is φ = 83777892.

The previous prime is 125666833. The next prime is 125666903. The reversal of 125666841 is 148666521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 148666521 = 3 ⋅49555507.

It is not a de Polignac number, because 125666841 - 2³ = 125666833 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 125666841.

It is not an unprimeable number, because it can be changed into a prime (125666041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20944471 + ... + 20944476.

It is an arithmetic number, because the mean of its divisors is an integer number (41888948).

Almost surely, 2^125666841 is an apocalyptic number.

It is an amenable number.

125666841 is a deficient number, since it is larger than the sum of its proper divisors (41888951).

125666841 is an equidigital number, since it uses as much as digits as its factorization.

125666841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41888950.

The product of its digits is 69120, while the sum is 39.

The square root of 125666841 is about 11210.1222562468. The cubic root of 125666841 is about 500.8875449291.

The spelling of 125666841 in words is "one hundred twenty-five million, six hundred sixty-six thousand, eight hundred forty-one".