144987621 has 16 divisors (see below), whose sum is σ = 199404288. Its totient is φ = 93656000.

The previous prime is 144987569. The next prime is 144987631. The reversal of 144987621 is 126789441.

It is a cyclic number.

It is not a de Polignac number, because 144987621 - 2⁹ = 144987109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144987631) 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 15 ways as a sum of consecutive naturals, for example, 9151 + ... + 19331.

It is an arithmetic number, because the mean of its divisors is an integer number (12462768).

Almost surely, 2^144987621 is an apocalyptic number.

It is an amenable number.

144987621 is a deficient number, since it is larger than the sum of its proper divisors (54416667).

144987621 is a wasteful number, since it uses less digits than its factorization.

144987621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10332.

The product of its digits is 96768, while the sum is 42.

The square root of 144987621 is about 12041.0805578237. The cubic root of 144987621 is about 525.3438364412.

The spelling of 144987621 in words is "one hundred forty-four million, nine hundred eighty-seven thousand, six hundred twenty-one".