144655561 has 4 divisors (see below), whose sum is σ = 145577092. Its totient is φ = 143734032.

The previous prime is 144655549. The next prime is 144655573. The reversal of 144655561 is 165556441.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (144655549) and next prime (144655573).

It can be written as a sum of positive squares in 2 ways, for example, as 72931600 + 71723961 = 8540^2 + 8469^2 .

It is a cyclic number.

It is not a de Polignac number, because 144655561 - 2¹³ = 144647369 is a prime.

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 144655561.

It is not an unprimeable number, because it can be changed into a prime (144655541) 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 3 ways as a sum of consecutive naturals, for example, 460530 + ... + 460843.

It is an arithmetic number, because the mean of its divisors is an integer number (36394273).

Almost surely, 2^144655561 is an apocalyptic number.

It is an amenable number.

144655561 is a deficient number, since it is larger than the sum of its proper divisors (921531).

144655561 is an equidigital number, since it uses as much as digits as its factorization.

144655561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921530.

The product of its digits is 72000, while the sum is 37.

The square root of 144655561 is about 12027.2840242509. The cubic root of 144655561 is about 524.9424710961.

The spelling of 144655561 in words is "one hundred forty-four million, six hundred fifty-five thousand, five hundred sixty-one".