125999099 has 4 divisors (see below), whose sum is σ = 128064720. Its totient is φ = 123933480.

The previous prime is 125999059. The next prime is 125999119. The reversal of 125999099 is 990999521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990999521 = 7583 ⋅130687.

It is a cyclic number.

It is not a de Polignac number, because 125999099 - 2⁸ = 125998843 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 125999099.

It is not an unprimeable number, because it can be changed into a prime (125999009) 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 3 ways as a sum of consecutive naturals, for example, 1032719 + ... + 1032840.

It is an arithmetic number, because the mean of its divisors is an integer number (32016180).

Almost surely, 2^125999099 is an apocalyptic number.

125999099 is a deficient number, since it is larger than the sum of its proper divisors (2065621).

125999099 is an equidigital number, since it uses as much as digits as its factorization.

125999099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065620.

The product of its (nonzero) digits is 590490, while the sum is 53.

The square root of 125999099 is about 11224.9320265202. The cubic root of 125999099 is about 501.3285985250.

The spelling of 125999099 in words is "one hundred twenty-five million, nine hundred ninety-nine thousand, ninety-nine".