144142785 has 24 divisors (see below), whose sum is σ = 250134144. Its totient is φ = 76788000.

The previous prime is 144142781. The next prime is 144142849. The reversal of 144142785 is 587241441.

It is a happy number.

It is not a de Polignac number, because 144142785 - 2² = 144142781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144142781) 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 23 ways as a sum of consecutive naturals, for example, 62910 + ... + 65160.

It is an arithmetic number, because the mean of its divisors is an integer number (10422256).

Almost surely, 2^144142785 is an apocalyptic number.

144142785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144142785 is a deficient number, since it is larger than the sum of its proper divisors (105991359).

144142785 is a wasteful number, since it uses less digits than its factorization.

144142785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3685 (or 3682 counting only the distinct ones).

The product of its digits is 35840, while the sum is 36.

The square root of 144142785 is about 12005.9479009364. The cubic root of 144142785 is about 524.3214635391.

The spelling of 144142785 in words is "one hundred forty-four million, one hundred forty-two thousand, seven hundred eighty-five".