126713421 has 12 divisors (see below), whose sum is σ = 184128672. Its totient is φ = 83968776.

The previous prime is 126713401. The next prime is 126713423. The reversal of 126713421 is 124317621.

It is not a de Polignac number, because 126713421 - 2⁶ = 126713357 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 (126713423) 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 11 ways as a sum of consecutive naturals, for example, 40651 + ... + 43656.

It is an arithmetic number, because the mean of its divisors is an integer number (15344056).

Almost surely, 2^126713421 is an apocalyptic number.

It is an amenable number.

126713421 is a deficient number, since it is larger than the sum of its proper divisors (57415251).

126713421 is a wasteful number, since it uses less digits than its factorization.

126713421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84480 (or 84477 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 126713421 is about 11256.7056015515. The cubic root of 126713421 is about 502.2742016640.

The spelling of 126713421 in words is "one hundred twenty-six million, seven hundred thirteen thousand, four hundred twenty-one".