154221412 has 24 divisors (see below), whose sum is σ = 272712440. Its totient is φ = 76308480.

The previous prime is 154221409. The next prime is 154221413. The reversal of 154221412 is 214122451.

It can be written as a sum of positive squares in 4 ways, for example, as 4990756 + 149230656 = 2234^2 + 12216^2 .

It is not an unprimeable number, because it can be changed into a prime (154221413) 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, 200164 + ... + 200932.

Almost surely, 2^154221412 is an apocalyptic number.

It is an amenable number.

154221412 is a deficient number, since it is larger than the sum of its proper divisors (118491028).

154221412 is a wasteful number, since it uses less digits than its factorization.

154221412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231 (or 1229 counting only the distinct ones).

The product of its digits is 640, while the sum is 22.

The square root of 154221412 is about 12418.5913854994. The cubic root of 154221412 is about 536.2675995405.

Adding to 154221412 its reverse (214122451), we get a palindrome (368343863).

The spelling of 154221412 in words is "one hundred fifty-four million, two hundred twenty-one thousand, four hundred twelve".