144471021 has 16 divisors (see below), whose sum is σ = 194785344. Its totient is φ = 95241344.

The previous prime is 144471017. The next prime is 144471029. The reversal of 144471021 is 120174441.

It is a cyclic number.

It is not a de Polignac number, because 144471021 - 2² = 144471017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144470982 and 144471000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144471029) 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, 142111 + ... + 143123.

It is an arithmetic number, because the mean of its divisors is an integer number (12174084).

Almost surely, 2^144471021 is an apocalyptic number.

It is an amenable number.

144471021 is a deficient number, since it is larger than the sum of its proper divisors (50314323).

144471021 is a wasteful number, since it uses less digits than its factorization.

144471021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 144471021 is about 12019.6098522373. The cubic root of 144471021 is about 524.7191495582.

The spelling of 144471021 in words is "one hundred forty-four million, four hundred seventy-one thousand, twenty-one".