126828821 has 8 divisors (see below), whose sum is σ = 147323904. Its totient is φ = 106927920.

The previous prime is 126828817. The next prime is 126828853. The reversal of 126828821 is 128828621.

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 126828821 - 2² = 126828817 is a prime.

It is a super-3 number, since 3×126828821³ (a number of 25 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126828881) 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, 148085 + ... + 148938.

It is an arithmetic number, because the mean of its divisors is an integer number (18415488).

Almost surely, 2^126828821 is an apocalyptic number.

It is an amenable number.

126828821 is a deficient number, since it is larger than the sum of its proper divisors (20495083).

126828821 is an equidigital number, since it uses as much as digits as its factorization.

126828821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297091.

The product of its digits is 24576, while the sum is 38.

The square root of 126828821 is about 11261.8302686553. The cubic root of 126828821 is about 502.4266318632.

The spelling of 126828821 in words is "one hundred twenty-six million, eight hundred twenty-eight thousand, eight hundred twenty-one".