144861449 has 8 divisors (see below), whose sum is σ = 146735400. Its totient is φ = 142995456.

The previous prime is 144861439. The next prime is 144861499. The reversal of 144861449 is 944168441.

It can be written as a sum of positive squares in 4 ways, for example, as 6375625 + 138485824 = 2525^2 + 11768^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144861449 - 2⁸ = 144861193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144861439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40277 + ... + 43725.

It is an arithmetic number, because the mean of its divisors is an integer number (18341925).

Almost surely, 2^144861449 is an apocalyptic number.

It is an amenable number.

144861449 is a deficient number, since it is larger than the sum of its proper divisors (1873951).

144861449 is an equidigital number, since it uses as much as digits as its factorization.

144861449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979.

The product of its digits is 110592, while the sum is 41.

The square root of 144861449 is about 12035.8401867090. The cubic root of 144861449 is about 525.1914029239.

The spelling of 144861449 in words is "one hundred forty-four million, eight hundred sixty-one thousand, four hundred forty-nine".