144872861 has 12 divisors (see below), whose sum is σ = 178439868. Its totient is φ = 116871552.

The previous prime is 144872857. The next prime is 144872867. The reversal of 144872861 is 168278441.

144872861 = T₂₃₅₈ + T₂₃₅₉ + ... + T₂₄₀₈.

It can be written as a sum of positive squares in 2 ways, for example, as 88247236 + 56625625 = 9394^2 + 7525^2 .

It is not a de Polignac number, because 144872861 - 2² = 144872857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144872867) 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 11 ways as a sum of consecutive naturals, for example, 86126 + ... + 87791.

It is an arithmetic number, because the mean of its divisors is an integer number (14869989).

Almost surely, 2^144872861 is an apocalyptic number.

It is an amenable number.

144872861 is a deficient number, since it is larger than the sum of its proper divisors (33567007).

144872861 is a wasteful number, since it uses less digits than its factorization.

144872861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173948 (or 173941 counting only the distinct ones).

The product of its digits is 86016, while the sum is 41.

The square root of 144872861 is about 12036.3142614340. The cubic root of 144872861 is about 525.2051938645.

The spelling of 144872861 in words is "one hundred forty-four million, eight hundred seventy-two thousand, eight hundred sixty-one".