144734865 has 16 divisors (see below), whose sum is σ = 252628416. Its totient is φ = 70174400.

The previous prime is 144734839. The next prime is 144734869. The reversal of 144734865 is 568437441.

It is not a de Polignac number, because 144734865 - 2⁵ = 144734833 is a prime.

It is a super-2 number, since 2×144734865² = 41896362293136450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (144734869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 438426 + ... + 438755.

It is an arithmetic number, because the mean of its divisors is an integer number (15789276).

Almost surely, 2^144734865 is an apocalyptic number.

144734865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144734865 is a deficient number, since it is larger than the sum of its proper divisors (107893551).

144734865 is a wasteful number, since it uses less digits than its factorization.

144734865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877200.

The product of its digits is 322560, while the sum is 42.

The square root of 144734865 is about 12030.5804099387. The cubic root of 144734865 is about 525.0383826813.

The spelling of 144734865 in words is "one hundred forty-four million, seven hundred thirty-four thousand, eight hundred sixty-five".