126389121 has 16 divisors (see below), whose sum is σ = 178083840. Its totient is φ = 79511760.

The previous prime is 126389099. The next prime is 126389147. The reversal of 126389121 is 121983621.

It is not a de Polignac number, because 126389121 - 2⁵ = 126389089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126389161) 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 15 ways as a sum of consecutive naturals, for example, 10776 + ... + 19206.

It is an arithmetic number, because the mean of its divisors is an integer number (11130240).

Almost surely, 2^126389121 is an apocalyptic number.

It is an amenable number.

126389121 is a deficient number, since it is larger than the sum of its proper divisors (51694719).

126389121 is a wasteful number, since it uses less digits than its factorization.

126389121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8716.

The product of its digits is 5184, while the sum is 33.

The square root of 126389121 is about 11242.2916258208. The cubic root of 126389121 is about 501.8453423778.

The spelling of 126389121 in words is "one hundred twenty-six million, three hundred eighty-nine thousand, one hundred twenty-one".