126101921 has 8 divisors (see below), whose sum is σ = 137676000. Its totient is φ = 114546240.

The previous prime is 126101909. The next prime is 126101953. The reversal of 126101921 is 129101621.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126101921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126101021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12530 + ... + 20228.

It is an arithmetic number, because the mean of its divisors is an integer number (17209500).

Almost surely, 2^126101921 is an apocalyptic number.

126101921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

126101921 is a deficient number, since it is larger than the sum of its proper divisors (11574079).

126101921 is a wasteful number, since it uses less digits than its factorization.

126101921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9199.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 126101921 is about 11229.5111647836. The cubic root of 126101921 is about 501.4649317582.

The spelling of 126101921 in words is "one hundred twenty-six million, one hundred one thousand, nine hundred twenty-one".