144646445 has 4 divisors (see below), whose sum is σ = 173575740. Its totient is φ = 115717152.

The previous prime is 144646429. The next prime is 144646451. The reversal of 144646445 is 544646441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544646441 = 2063 ⋅264007.

It can be written as a sum of positive squares in 2 ways, for example, as 58583716 + 86062729 = 7654^2 + 9277^2 .

It is a cyclic number.

It is not a de Polignac number, because 144646445 - 2⁴ = 144646429 is a prime.

It is a super-2 number, since 2×144646445² = 41845188102276050, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 144646399 and 144646408.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 14464640 + ... + 14464649.

It is an arithmetic number, because the mean of its divisors is an integer number (43393935).

Almost surely, 2^144646445 is an apocalyptic number.

It is an amenable number.

144646445 is a deficient number, since it is larger than the sum of its proper divisors (28929295).

144646445 is an equidigital number, since it uses as much as digits as its factorization.

144646445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28929294.

The product of its digits is 184320, while the sum is 38.

The square root of 144646445 is about 12026.9050466028. The cubic root of 144646445 is about 524.9314438070.

The spelling of 144646445 in words is "one hundred forty-four million, six hundred forty-six thousand, four hundred forty-five".