125139841 has 4 divisors (see below), whose sum is σ = 125166384. Its totient is φ = 125113300.

The previous prime is 125139829. The next prime is 125139851. The reversal of 125139841 is 148931521.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125139841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 125139797 and 125139806.

It is not an unprimeable number, because it can be changed into a prime (125139811) 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, 4075 + ... + 16336.

It is an arithmetic number, because the mean of its divisors is an integer number (31291596).

Almost surely, 2^125139841 is an apocalyptic number.

It is an amenable number.

125139841 is a deficient number, since it is larger than the sum of its proper divisors (26543).

125139841 is an equidigital number, since it uses as much as digits as its factorization.

125139841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26542.

The product of its digits is 8640, while the sum is 34.

The square root of 125139841 is about 11186.5920190199. The cubic root of 125139841 is about 500.1863851792.

The spelling of 125139841 in words is "one hundred twenty-five million, one hundred thirty-nine thousand, eight hundred forty-one".