144821971 has 16 divisors (see below), whose sum is σ = 174895360. Its totient is φ = 117145440.

The previous prime is 144821953. The next prime is 144821983. The reversal of 144821971 is 179128441.

144821971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 144821971 - 2⁵ = 144821939 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 144821971.

It is not an unprimeable number, because it can be changed into a prime (144821951) 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, 34876 + ... + 38806.

It is an arithmetic number, because the mean of its divisors is an integer number (10930960).

Almost surely, 2^144821971 is an apocalyptic number.

144821971 is a deficient number, since it is larger than the sum of its proper divisors (30073389).

144821971 is a wasteful number, since it uses less digits than its factorization.

144821971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4234.

The product of its digits is 16128, while the sum is 37.

The square root of 144821971 is about 12034.2000565056. The cubic root of 144821971 is about 525.1436897698.

The spelling of 144821971 in words is "one hundred forty-four million, eight hundred twenty-one thousand, nine hundred seventy-one".