144137985 has 16 divisors (see below), whose sum is σ = 244187136. Its totient is φ = 72351488.

The previous prime is 144137957. The next prime is 144137999. The reversal of 144137985 is 589731441.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 144137985 - 2⁶ = 144137921 is a prime.

It is an unprimeable number.

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, 282369 + ... + 282878.

It is an arithmetic number, because the mean of its divisors is an integer number (15261696).

Almost surely, 2^144137985 is an apocalyptic number.

144137985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144137985 is a deficient number, since it is larger than the sum of its proper divisors (100049151).

144137985 is a wasteful number, since it uses less digits than its factorization.

144137985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565272.

The product of its digits is 120960, while the sum is 42.

The square root of 144137985 is about 12005.7479983548. The cubic root of 144137985 is about 524.3156434514.

The spelling of 144137985 in words is "one hundred forty-four million, one hundred thirty-seven thousand, nine hundred eighty-five".