125170987 has 2 divisors, whose sum is σ = 125170988. Its totient is φ = 125170986.

The previous prime is 125170973. The next prime is 125170999. The reversal of 125170987 is 789071521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 125170987 - 2¹⁹ = 124646699 is a prime.

It is not a weakly prime, because it can be changed into another prime (125170957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62585493 + 62585494.

It is an arithmetic number, because the mean of its divisors is an integer number (62585494).

Almost surely, 2^125170987 is an apocalyptic number.

125170987 is a deficient number, since it is larger than the sum of its proper divisors (1).

125170987 is an equidigital number, since it uses as much as digits as its factorization.

125170987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 40.

The square root of 125170987 is about 11187.9840453944. The cubic root of 125170987 is about 500.2278787934.

The spelling of 125170987 in words is "one hundred twenty-five million, one hundred seventy thousand, nine hundred eighty-seven".