125868647 has 4 divisors (see below), whose sum is σ = 128938656. Its totient is φ = 122798640.

The previous prime is 125868643. The next prime is 125868689. The reversal of 125868647 is 746868521.

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

It is a cyclic number.

It is not a de Polignac number, because 125868647 - 2² = 125868643 is a prime.

It is a super-2 number, since 2×125868647² = 31685832595221218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125868641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534943 + ... + 1535024.

It is an arithmetic number, because the mean of its divisors is an integer number (32234664).

Almost surely, 2^125868647 is an apocalyptic number.

125868647 is a deficient number, since it is larger than the sum of its proper divisors (3070009).

125868647 is an equidigital number, since it uses as much as digits as its factorization.

125868647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070008.

The product of its digits is 645120, while the sum is 47.

The square root of 125868647 is about 11219.1197070002. The cubic root of 125868647 is about 501.1555234738.

The spelling of 125868647 in words is "one hundred twenty-five million, eight hundred sixty-eight thousand, six hundred forty-seven".