144561261 has 16 divisors (see below), whose sum is σ = 208732160. Its totient is φ = 88464960.

The previous prime is 144561247. The next prime is 144561281. The reversal of 144561261 is 162165441.

It is not a de Polignac number, because 144561261 - 2⁷ = 144561133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144561281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3181 + ... + 17298.

It is an arithmetic number, because the mean of its divisors is an integer number (13045760).

Almost surely, 2^144561261 is an apocalyptic number.

It is an amenable number.

144561261 is a deficient number, since it is larger than the sum of its proper divisors (64170899).

144561261 is a wasteful number, since it uses less digits than its factorization.

144561261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20676.

The product of its digits is 5760, while the sum is 30.

The square root of 144561261 is about 12023.3631318363. The cubic root of 144561261 is about 524.8283774628.

The spelling of 144561261 in words is "one hundred forty-four million, five hundred sixty-one thousand, two hundred sixty-one".