124221906 has 24 divisors (see below), whose sum is σ = 278429580. Its totient is φ = 39979296.

The previous prime is 124221901. The next prime is 124221931. The reversal of 124221906 is 609122421.

It can be written as a sum of positive squares in 2 ways, for example, as 111197025 + 13024881 = 10545^2 + 3609^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 124221906.

It is not an unprimeable number, because it can be changed into a prime (124221901) 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, 118465 + ... + 119508.

Almost surely, 2^124221906 is an apocalyptic number.

124221906 is an abundant number, since it is smaller than the sum of its proper divisors (154207674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

124221906 is a wasteful number, since it uses less digits than its factorization.

124221906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238010 (or 238007 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 124221906 is about 11145.4881454336. The cubic root of 124221906 is about 498.9603812171.

The spelling of 124221906 in words is "one hundred twenty-four million, two hundred twenty-one thousand, nine hundred six".