144021306 has 64 divisors (see below), whose sum is σ = 340341120. Its totient is φ = 40055040.

The previous prime is 144021277. The next prime is 144021307. The reversal of 144021306 is 603120441.

144021306 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (144021307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 196116 + ... + 196848.

It is an arithmetic number, because the mean of its divisors is an integer number (5317830).

Almost surely, 2^144021306 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144021306, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170170560).

144021306 is an abundant number, since it is smaller than the sum of its proper divisors (196319814).

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

144021306 is a wasteful number, since it uses less digits than its factorization.

144021306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 144021306 is about 12000.8877171649. The cubic root of 144021306 is about 524.1741282689.

Adding to 144021306 its reverse (603120441), we get a palindrome (747141747).

The spelling of 144021306 in words is "one hundred forty-four million, twenty-one thousand, three hundred six".