126421828 has 12 divisors (see below), whose sum is σ = 238256620. Its totient is φ = 58348512.

The previous prime is 126421783. The next prime is 126421861. The reversal of 126421828 is 828124621.

It can be written as a sum of positive squares in 2 ways, for example, as 27060804 + 99361024 = 5202^2 + 9968^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 126421793 and 126421802.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1215543 + ... + 1215646.

Almost surely, 2^126421828 is an apocalyptic number.

It is an amenable number.

126421828 is a deficient number, since it is larger than the sum of its proper divisors (111834792).

126421828 is a wasteful number, since it uses less digits than its factorization.

126421828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2431206 (or 2431204 counting only the distinct ones).

The product of its digits is 12288, while the sum is 34.

The square root of 126421828 is about 11243.7461728732. The cubic root of 126421828 is about 501.8886278542. Note that the first 3 decimals are identical.

The spelling of 126421828 in words is "one hundred twenty-six million, four hundred twenty-one thousand, eight hundred twenty-eight".