126459821 has 8 divisors (see below), whose sum is σ = 137518200. Its totient is φ = 115803648.

The previous prime is 126459811. The next prime is 126459841. The reversal of 126459821 is 128954621.

It can be written as a sum of positive squares in 4 ways, for example, as 65448100 + 61011721 = 8090^2 + 7811^2 .

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 126459821 - 2¹⁴ = 126443437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126459811) 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 7 ways as a sum of consecutive naturals, for example, 99896 + ... + 101153.

It is an arithmetic number, because the mean of its divisors is an integer number (17189775).

Almost surely, 2^126459821 is an apocalyptic number.

It is an amenable number.

126459821 is a deficient number, since it is larger than the sum of its proper divisors (11058379).

126459821 is a wasteful number, since it uses less digits than its factorization.

126459821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201103.

The product of its digits is 34560, while the sum is 38.

The square root of 126459821 is about 11245.4355629295. The cubic root of 126459821 is about 501.9388996179.

The spelling of 126459821 in words is "one hundred twenty-six million, four hundred fifty-nine thousand, eight hundred twenty-one".