144472821 has 12 divisors (see below), whose sum is σ = 201144672. Its totient is φ = 92063928.

The previous prime is 144472793. The next prime is 144472829. The reversal of 144472821 is 128274441.

It is not a de Polignac number, because 144472821 - 2¹⁷ = 144341749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144472829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99120 + ... + 100566.

It is an arithmetic number, because the mean of its divisors is an integer number (16762056).

Almost surely, 2^144472821 is an apocalyptic number.

It is an amenable number.

144472821 is a deficient number, since it is larger than the sum of its proper divisors (56671851).

144472821 is an frugal number, since it uses more digits than its factorization.

144472821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920 (or 1473 counting only the distinct ones).

The product of its digits is 14336, while the sum is 33.

The square root of 144472821 is about 12019.6847296425. The cubic root of 144472821 is about 524.7213287508.

The spelling of 144472821 in words is "one hundred forty-four million, four hundred seventy-two thousand, eight hundred twenty-one".