144264321 has 20 divisors (see below), whose sum is σ = 226850800. Its totient is φ = 91113336.

The previous prime is 144264319. The next prime is 144264331. The reversal of 144264321 is 123462441.

It is a happy number.

144264321 is a `hidden beast` number, since 14 + 4 + 2 + 643 + 2 + 1 = 666.

It is not a de Polignac number, because 144264321 - 2¹ = 144264319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144264301) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 45331 + ... + 48408.

It is an arithmetic number, because the mean of its divisors is an integer number (11342540).

Almost surely, 2^144264321 is an apocalyptic number.

It is an amenable number.

144264321 is a deficient number, since it is larger than the sum of its proper divisors (82586479).

144264321 is an equidigital number, since it uses as much as digits as its factorization.

144264321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93770 (or 93761 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 144264321 is about 12011.0083256986. The cubic root of 144264321 is about 524.4687851270.

The spelling of 144264321 in words is "one hundred forty-four million, two hundred sixty-four thousand, three hundred twenty-one".