144621556 has 12 divisors (see below), whose sum is σ = 258973792. Its totient is φ = 70629048.

The previous prime is 144621551. The next prime is 144621563. The reversal of 144621556 is 655126441.

It is a super-2 number, since 2×144621556² = 41830788919722272, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144621551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420240 + ... + 420583.

Almost surely, 2^144621556 is an apocalyptic number.

It is an amenable number.

144621556 is a deficient number, since it is larger than the sum of its proper divisors (114352236).

144621556 is a wasteful number, since it uses less digits than its factorization.

144621556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840870 (or 840868 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 144621556 is about 12025.8702803581. The cubic root of 144621556 is about 524.9013341417.

Adding to 144621556 its reverse (655126441), we get a palindrome (799747997).

The spelling of 144621556 in words is "one hundred forty-four million, six hundred twenty-one thousand, five hundred fifty-six".