144472861 has 6 divisors (see below), whose sum is σ = 156441210. Its totient is φ = 133359408.

The previous prime is 144472849. The next prime is 144472879. The reversal of 144472861 is 168274441.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 352836 + 144120025 = 594^2 + 12005^2 .

It is not a de Polignac number, because 144472861 - 2⁵ = 144472829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144472861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144472841) 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, 427266 + ... + 427603.

It is an arithmetic number, because the mean of its divisors is an integer number (26073535).

Almost surely, 2^144472861 is an apocalyptic number.

It is an amenable number.

144472861 is a deficient number, since it is larger than the sum of its proper divisors (11968349).

144472861 is an equidigital number, since it uses as much as digits as its factorization.

144472861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 854895 (or 854882 counting only the distinct ones).

The product of its digits is 43008, while the sum is 37.

The square root of 144472861 is about 12019.6863935795. The cubic root of 144472861 is about 524.7213771771.

It can be divided in two parts, 1444 and 72861, that added together give a triangular number (74305 = T₃₈₅).

The spelling of 144472861 in words is "one hundred forty-four million, four hundred seventy-two thousand, eight hundred sixty-one".