144643401 has 40 divisors (see below), whose sum is σ = 250487424. Its totient is φ = 81466560.

The previous prime is 144643381. The next prime is 144643417. The reversal of 144643401 is 104346441.

144643401 is a `hidden beast` number, since 14 + 4 + 643 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 144643401 - 2⁶ = 144643337 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (144647401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 38461 + ... + 42053.

Almost surely, 2^144643401 is an apocalyptic number.

It is an amenable number.

144643401 is a deficient number, since it is larger than the sum of its proper divisors (105844023).

144643401 is an equidigital number, since it uses as much as digits as its factorization.

144643401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3683 (or 3674 counting only the distinct ones).

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

The square root of 144643401 is about 12026.7784963389. The cubic root of 144643401 is about 524.9277614892.

Adding to 144643401 its reverse (104346441), we get a palindrome (248989842).

It can be divided in two parts, 144 and 643401, that added together give a triangular number (643545 = T₁₁₃₄).

The spelling of 144643401 in words is "one hundred forty-four million, six hundred forty-three thousand, four hundred one".