125651987 has 2 divisors, whose sum is σ = 125651988. Its totient is φ = 125651986.

The previous prime is 125651971. The next prime is 125651993. The reversal of 125651987 is 789156521.

It is a strong prime.

It is an emirp because it is prime and its reverse (789156521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125651987 - 2⁴ = 125651971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (125641987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62825993 + 62825994.

It is an arithmetic number, because the mean of its divisors is an integer number (62825994).

Almost surely, 2^125651987 is an apocalyptic number.

125651987 is a deficient number, since it is larger than the sum of its proper divisors (1).

125651987 is an equidigital number, since it uses as much as digits as its factorization.

125651987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151200, while the sum is 44.

The square root of 125651987 is about 11209.4597104410. The cubic root of 125651987 is about 500.8678089439.

The spelling of 125651987 in words is "one hundred twenty-five million, six hundred fifty-one thousand, nine hundred eighty-seven".