144502421 has 6 divisors (see below), whose sum is σ = 168094710. Its totient is φ = 123859176.

The previous prime is 144502411. The next prime is 144502441. The reversal of 144502421 is 124205441.

It can be written as a sum of positive squares in only one way, i.e., 86285521 + 58216900 = 9289^2 + 7630^2 .

It is not a de Polignac number, because 144502421 - 2²⁶ = 77393557 is a prime.

It is a super-2 number, since 2×144502421² = 41761899349722482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144502411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1474466 + ... + 1474563.

It is an arithmetic number, because the mean of its divisors is an integer number (28015785).

Almost surely, 2^144502421 is an apocalyptic number.

It is an amenable number.

144502421 is a deficient number, since it is larger than the sum of its proper divisors (23592289).

144502421 is an equidigital number, since it uses as much as digits as its factorization.

144502421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2949043 (or 2949036 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 144502421 is about 12020.9159800741. The cubic root of 144502421 is about 524.7571617668.

Adding to 144502421 its reverse (124205441), we get a palindrome (268707862).

The spelling of 144502421 in words is "one hundred forty-four million, five hundred two thousand, four hundred twenty-one".