125543387 has 2 divisors, whose sum is σ = 125543388. Its totient is φ = 125543386.

The previous prime is 125543357. The next prime is 125543389. The reversal of 125543387 is 783345521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125543387 - 2¹⁶ = 125477851 is a prime.

It is a super-2 number, since 2×125543387² = 31522284038863538, which contains 22 as substring.

Together with 125543389, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125543387.

It is not a weakly prime, because it can be changed into another prime (125543389) 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 as a sum of consecutive naturals, namely, 62771693 + 62771694.

It is an arithmetic number, because the mean of its divisors is an integer number (62771694).

Almost surely, 2^125543387 is an apocalyptic number.

125543387 is a deficient number, since it is larger than the sum of its proper divisors (1).

125543387 is an equidigital number, since it uses as much as digits as its factorization.

125543387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 100800, while the sum is 38.

The square root of 125543387 is about 11204.6145404472. The cubic root of 125543387 is about 500.7234686812.

The spelling of 125543387 in words is "one hundred twenty-five million, five hundred forty-three thousand, three hundred eighty-seven".