125849939 has 8 divisors (see below), whose sum is σ = 133787280. Its totient is φ = 118044000.

The previous prime is 125849921. The next prime is 125849947. The reversal of 125849939 is 939948521.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125849939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125849909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30872 + ... + 34709.

It is an arithmetic number, because the mean of its divisors is an integer number (16723410).

Almost surely, 2^125849939 is an apocalyptic number.

125849939 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

125849939 is a deficient number, since it is larger than the sum of its proper divisors (7937341).

125849939 is a wasteful number, since it uses less digits than its factorization.

125849939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65701.

The product of its digits is 699840, while the sum is 50.

The square root of 125849939 is about 11218.2859207635. The cubic root of 125849939 is about 501.1306931386.

The spelling of 125849939 in words is "one hundred twenty-five million, eight hundred forty-nine thousand, nine hundred thirty-nine".