144415861 has 4 divisors (see below), whose sum is σ = 144787500. Its totient is φ = 144044224.

The previous prime is 144415823. The next prime is 144415877. The reversal of 144415861 is 168514441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 168514441 = 73 ⋅2308417.

It can be written as a sum of positive squares in 2 ways, for example, as 75359761 + 69056100 = 8681^2 + 8310^2 .

It is a cyclic number.

It is not a de Polignac number, because 144415861 - 2¹⁵ = 144383093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144415361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185236 + ... + 186013.

It is an arithmetic number, because the mean of its divisors is an integer number (36196875).

Almost surely, 2^144415861 is an apocalyptic number.

It is an amenable number.

144415861 is a deficient number, since it is larger than the sum of its proper divisors (371639).

144415861 is an equidigital number, since it uses as much as digits as its factorization.

144415861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 371638.

The product of its digits is 15360, while the sum is 34.

The square root of 144415861 is about 12017.3150495441. The cubic root of 144415861 is about 524.6523606329.

It can be divided in two parts, 14441 and 5861, that added together give a palindrome (20302).

The spelling of 144415861 in words is "one hundred forty-four million, four hundred fifteen thousand, eight hundred sixty-one".