125029987 has 2 divisors, whose sum is σ = 125029988. Its totient is φ = 125029986.

The previous prime is 125029981. The next prime is 125029997. The reversal of 125029987 is 789920521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125029987 - 2⁷ = 125029859 is a prime.

It is not a weakly prime, because it can be changed into another prime (125029981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62514993 + 62514994.

It is an arithmetic number, because the mean of its divisors is an integer number (62514994).

Almost surely, 2^125029987 is an apocalyptic number.

125029987 is a deficient number, since it is larger than the sum of its proper divisors (1).

125029987 is an equidigital number, since it uses as much as digits as its factorization.

125029987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 125029987 is about 11181.6808664887. The cubic root of 125029987 is about 500.0399794699.

The spelling of 125029987 in words is "one hundred twenty-five million, twenty-nine thousand, nine hundred eighty-seven".