126218421 has 24 divisors (see below), whose sum is σ = 220618944. Its totient is φ = 67881600.

The previous prime is 126218413. The next prime is 126218429. The reversal of 126218421 is 124812621.

126218421 is a `hidden beast` number, since 1 + 26 + 218 + 421 = 666.

It is an interprime number because it is at equal distance from previous prime (126218413) and next prime (126218429).

It is not a de Polignac number, because 126218421 - 2³ = 126218413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126218429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57855 + ... + 59996.

It is an arithmetic number, because the mean of its divisors is an integer number (9192456).

Almost surely, 2^126218421 is an apocalyptic number.

It is an amenable number.

126218421 is a deficient number, since it is larger than the sum of its proper divisors (94400523).

126218421 is a wasteful number, since it uses less digits than its factorization.

126218421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117881 (or 117878 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 126218421 is about 11234.6971921810. The cubic root of 126218421 is about 501.6193113335.

It can be divided in two parts, 1262 and 18421, that added together give a 9-th power (19683 = 3⁹).

The spelling of 126218421 in words is "one hundred twenty-six million, two hundred eighteen thousand, four hundred twenty-one".