144921 has 16 divisors (see below), whose sum is σ = 226304. Its totient is φ = 80784.

The previous prime is 144917. The next prime is 144931. The reversal of 144921 is 129441.

It is not a de Polignac number, because 144921 - 2² = 144917 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

144921 is a lucky number.

It is a nialpdrome in base 11.

It is a zygodrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 144921.

It is not an unprimeable number, because it can be changed into a prime (144931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1356 + ... + 1458.

It is an arithmetic number, because the mean of its divisors is an integer number (14144).

2¹⁴⁴⁹²¹ is an apocalyptic number.

It is an amenable number.

144921 is a deficient number, since it is larger than the sum of its proper divisors (81383).

144921 is a wasteful number, since it uses less digits than its factorization.

144921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its digits is 288, while the sum is 21.

The square root of 144921 is about 380.6849090784. The cubic root of 144921 is about 52.5263359930.

The spelling of 144921 in words is "one hundred forty-four thousand, nine hundred twenty-one".