126133421 has 8 divisors (see below), whose sum is σ = 135743544. Its totient is φ = 116766720.

The previous prime is 126133411. The next prime is 126133453. The reversal of 126133421 is 124331621.

It can be written as a sum of positive squares in 4 ways, for example, as 36168196 + 89965225 = 6014^2 + 9485^2 .

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 126133421 - 2¹⁴ = 126117037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126133411) 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, 59780 + ... + 61853.

It is an arithmetic number, because the mean of its divisors is an integer number (16967943).

Almost surely, 2^126133421 is an apocalyptic number.

It is an amenable number.

126133421 is a deficient number, since it is larger than the sum of its proper divisors (9610123).

126133421 is a wasteful number, since it uses less digits than its factorization.

126133421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121711.

The product of its digits is 864, while the sum is 23.

The square root of 126133421 is about 11230.9136315796. The cubic root of 126133421 is about 501.5066832507.

The spelling of 126133421 in words is "one hundred twenty-six million, one hundred thirty-three thousand, four hundred twenty-one".