125138747 has 4 divisors (see below), whose sum is σ = 126308376. Its totient is φ = 123969120.

The previous prime is 125138737. The next prime is 125138749. The reversal of 125138747 is 747831521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 747831521 = 11657 ⋅64153.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125138747 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 125138747.

It is not an unprimeable number, because it can be changed into a prime (125138749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 584654 + ... + 584867.

It is an arithmetic number, because the mean of its divisors is an integer number (31577094).

Almost surely, 2^125138747 is an apocalyptic number.

125138747 is a deficient number, since it is larger than the sum of its proper divisors (1169629).

125138747 is a wasteful number, since it uses less digits than its factorization.

125138747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1169628.

The product of its digits is 47040, while the sum is 38.

The square root of 125138747 is about 11186.5431210897. The cubic root of 125138747 is about 500.1849275951.

The spelling of 125138747 in words is "one hundred twenty-five million, one hundred thirty-eight thousand, seven hundred forty-seven".