144421252 has 6 divisors (see below), whose sum is σ = 252737198. Its totient is φ = 72210624.

The previous prime is 144421241. The next prime is 144421253. The reversal of 144421252 is 252124441.

It can be written as a sum of positive squares in only one way, i.e., 129413376 + 15007876 = 11376^2 + 3874^2 .

It is not an unprimeable number, because it can be changed into a prime (144421253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18052653 + ... + 18052660.

Almost surely, 2^144421252 is an apocalyptic number.

It is an amenable number.

144421252 is a deficient number, since it is larger than the sum of its proper divisors (108315946).

144421252 is a wasteful number, since it uses less digits than its factorization.

144421252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36105317 (or 36105315 counting only the distinct ones).

The product of its digits is 2560, while the sum is 25.

The square root of 144421252 is about 12017.5393488018. The cubic root of 144421252 is about 524.6588889225.

Adding to 144421252 its reverse (252124441), we get a palindrome (396545693).

The spelling of 144421252 in words is "one hundred forty-four million, four hundred twenty-one thousand, two hundred fifty-two".