144392621 has 8 divisors (see below), whose sum is σ = 146567160. Its totient is φ = 142230528.

The previous prime is 144392593. The next prime is 144392641. The reversal of 144392621 is 126293441.

It can be written as a sum of positive squares in 4 ways, for example, as 14546596 + 129846025 = 3814^2 + 11395^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144392621 - 2¹⁴ = 144376237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144392641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21725 + ... + 27581.

It is an arithmetic number, because the mean of its divisors is an integer number (18320895).

Almost surely, 2^144392621 is an apocalyptic number.

It is an amenable number.

144392621 is a deficient number, since it is larger than the sum of its proper divisors (2174539).

144392621 is an equidigital number, since it uses as much as digits as its factorization.

144392621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223.

The product of its digits is 10368, while the sum is 32.

The square root of 144392621 is about 12016.3480725219. The cubic root of 144392621 is about 524.6242160444.

The spelling of 144392621 in words is "one hundred forty-four million, three hundred ninety-two thousand, six hundred twenty-one".