125387999 has 8 divisors (see below), whose sum is σ = 136906320. Its totient is φ = 113889600.

The previous prime is 125387993. The next prime is 125388007. The reversal of 125387999 is 999783521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 125387999 - 2¹² = 125383903 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125387999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125387993) 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 in 7 ways as a sum of consecutive naturals, for example, 10217 + ... + 18845.

It is an arithmetic number, because the mean of its divisors is an integer number (17113290).

Almost surely, 2^125387999 is an apocalyptic number.

125387999 is a deficient number, since it is larger than the sum of its proper divisors (11518321).

125387999 is a wasteful number, since it uses less digits than its factorization.

125387999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9961.

The product of its digits is 1224720, while the sum is 53.

The square root of 125387999 is about 11197.6782861449. The cubic root of 125387999 is about 500.5167976563.

The spelling of 125387999 in words is "one hundred twenty-five million, three hundred eighty-seven thousand, nine hundred ninety-nine".