126099961 has 8 divisors (see below), whose sum is σ = 141704640. Its totient is φ = 111338832.

The previous prime is 126099929. The next prime is 126099973. The reversal of 126099961 is 169990621.

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

It is a cyclic number.

It is not a de Polignac number, because 126099961 - 2⁵ = 126099929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126099361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210571 + ... + 211168.

It is an arithmetic number, because the mean of its divisors is an integer number (17713080).

Almost surely, 2^126099961 is an apocalyptic number.

It is an amenable number.

126099961 is a deficient number, since it is larger than the sum of its proper divisors (15604679).

126099961 is a wasteful number, since it uses less digits than its factorization.

126099961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421775.

The product of its (nonzero) digits is 52488, while the sum is 43.

The square root of 126099961 is about 11229.4238943946. The cubic root of 126099961 is about 501.4623336578.

The spelling of 126099961 in words is "one hundred twenty-six million, ninety-nine thousand, nine hundred sixty-one".