144003981 has 16 divisors (see below), whose sum is σ = 212897088. Its totient is φ = 85843200.

The previous prime is 144003973. The next prime is 144003997. The reversal of 144003981 is 189300441.

It is a happy number.

It is not a de Polignac number, because 144003981 - 2³ = 144003973 is a prime.

It is a super-2 number, since 2×144003981² = 41474293087696722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144003901) 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, 33756 + ... + 37781.

It is an arithmetic number, because the mean of its divisors is an integer number (13306068).

Almost surely, 2^144003981 is an apocalyptic number.

144003981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144003981 is a deficient number, since it is larger than the sum of its proper divisors (68893107).

144003981 is a wasteful number, since it uses less digits than its factorization.

144003981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71612.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 144003981 is about 12000.1658738536. The cubic root of 144003981 is about 524.1531089693.

It can be divided in two parts, 14400 and 3981, that added together give a palindrome (18381).

The spelling of 144003981 in words is "one hundred forty-four million, three thousand, nine hundred eighty-one".