144867621 has 8 divisors (see below), whose sum is σ = 194962464. Its totient is φ = 95675600.

The previous prime is 144867599. The next prime is 144867631. The reversal of 144867621 is 126768441.

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 144867621 - 2⁷ = 144867493 is a prime.

It is a super-2 number, since 2×144867621² = 41973255228399282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144867621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144867631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225330 + ... + 225971.

It is an arithmetic number, because the mean of its divisors is an integer number (24370308).

Almost surely, 2^144867621 is an apocalyptic number.

It is an amenable number.

144867621 is a deficient number, since it is larger than the sum of its proper divisors (50094843).

144867621 is a wasteful number, since it uses less digits than its factorization.

144867621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451411.

The product of its digits is 64512, while the sum is 39.

The square root of 144867621 is about 12036.0965848567. The cubic root of 144867621 is about 525.1988616263.

The spelling of 144867621 in words is "one hundred forty-four million, eight hundred sixty-seven thousand, six hundred twenty-one".