125779147 has 4 divisors (see below), whose sum is σ = 135454480. Its totient is φ = 116103816.

The previous prime is 125779117. The next prime is 125779163. The reversal of 125779147 is 741977521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125779147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125779117) 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, 4837647 + ... + 4837672.

It is an arithmetic number, because the mean of its divisors is an integer number (33863620).

Almost surely, 2^125779147 is an apocalyptic number.

125779147 is a deficient number, since it is larger than the sum of its proper divisors (9675333).

125779147 is an equidigital number, since it uses as much as digits as its factorization.

125779147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9675332.

The product of its digits is 123480, while the sum is 43.

The square root of 125779147 is about 11215.1302712006. The cubic root of 125779147 is about 501.0367116390.

The spelling of 125779147 in words is "one hundred twenty-five million, seven hundred seventy-nine thousand, one hundred forty-seven".