144240561 has 16 divisors (see below), whose sum is σ = 213998400. Its totient is φ = 96021504.

The previous prime is 144240553. The next prime is 144240581. The reversal of 144240561 is 165042441.

It is not a de Polignac number, because 144240561 - 2³ = 144240553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (144240511) 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, 17290 + ... + 24236.

It is an arithmetic number, because the mean of its divisors is an integer number (13374900).

Almost surely, 2^144240561 is an apocalyptic number.

It is an amenable number.

144240561 is a deficient number, since it is larger than the sum of its proper divisors (69757839).

144240561 is an equidigital number, since it uses as much as digits as its factorization.

144240561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725 (or 7719 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 144240561 is about 12010.0191923244. The cubic root of 144240561 is about 524.4399906141.

The spelling of 144240561 in words is "one hundred forty-four million, two hundred forty thousand, five hundred sixty-one".