144506881 has 4 divisors (see below), whose sum is σ = 144550192. Its totient is φ = 144463572.

The previous prime is 144506863. The next prime is 144506891. The reversal of 144506881 is 188605441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144506881 - 2¹³ = 144498689 is a prime.

It is a super-2 number, since 2×144506881² = 41764477312696322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144506881.

It is not an unprimeable number, because it can be changed into a prime (144506821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16191 + ... + 23476.

It is an arithmetic number, because the mean of its divisors is an integer number (36137548).

It is a Proth number, since it is equal to 2205 ⋅ 2¹⁶ + 1 and 2205 < 2¹⁶.

Almost surely, 2^144506881 is an apocalyptic number.

It is an amenable number.

144506881 is a deficient number, since it is larger than the sum of its proper divisors (43311).

144506881 is an equidigital number, since it uses as much as digits as its factorization.

144506881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43310.

The product of its (nonzero) digits is 30720, while the sum is 37.

The square root of 144506881 is about 12021.1014886324. The cubic root of 144506881 is about 524.7625605065.

The spelling of 144506881 in words is "one hundred forty-four million, five hundred six thousand, eight hundred eighty-one".