144550921 has 4 divisors (see below), whose sum is σ = 145954432. Its totient is φ = 143147412.

The previous prime is 144550919. The next prime is 144550927. The reversal of 144550921 is 129055441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144550921 - 2¹ = 144550919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144550927) 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, 701601 + ... + 701806.

It is an arithmetic number, because the mean of its divisors is an integer number (36488608).

Almost surely, 2^144550921 is an apocalyptic number.

It is an amenable number.

144550921 is a deficient number, since it is larger than the sum of its proper divisors (1403511).

144550921 is a wasteful number, since it uses less digits than its factorization.

144550921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403510.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 144550921 is about 12022.9331279850. The cubic root of 144550921 is about 524.8158640716.

The spelling of 144550921 in words is "one hundred forty-four million, five hundred fifty thousand, nine hundred twenty-one".