144121817 has 8 divisors (see below), whose sum is σ = 164984256. Its totient is φ = 123327792.

The previous prime is 144121811. The next prime is 144121819. The reversal of 144121817 is 718121441.

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

It is not a de Polignac number, because 144121817 - 2⁶ = 144121753 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 144121817.

It is not an unprimeable number, because it can be changed into a prime (144121811) 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, 12503 + ... + 21084.

It is an arithmetic number, because the mean of its divisors is an integer number (20623032).

Almost surely, 2^144121817 is an apocalyptic number.

It is an amenable number.

144121817 is a deficient number, since it is larger than the sum of its proper divisors (20862439).

144121817 is an equidigital number, since it uses as much as digits as its factorization.

144121817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34207.

The product of its digits is 1792, while the sum is 29.

The square root of 144121817 is about 12005.0746353365. The cubic root of 144121817 is about 524.2960385053.

Subtracting from 144121817 its product of digits (1792), we obtain a square (144120025 = 12005²).

The spelling of 144121817 in words is "one hundred forty-four million, one hundred twenty-one thousand, eight hundred seventeen".