144421002 has 144 divisors (see below), whose sum is σ = 380358720. Its totient is φ = 40510800.

The previous prime is 144420973. The next prime is 144421007. The reversal of 144421002 is 200124441.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144421007) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4658727 + ... + 4658757.

It is an arithmetic number, because the mean of its divisors is an integer number (2641380).

Almost surely, 2^144421002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 144421002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (190179360).

144421002 is an abundant number, since it is smaller than the sum of its proper divisors (235937718).

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

144421002 is a wasteful number, since it uses less digits than its factorization.

144421002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 144421002 is about 12017.5289473336. The cubic root of 144421002 is about 524.6585861859.

Adding to 144421002 its reverse (200124441), we get a palindrome (344545443).

The spelling of 144421002 in words is "one hundred forty-four million, four hundred twenty-one thousand, two".