144540561 has 8 divisors (see below), whose sum is σ = 210240864. Its totient is φ = 87600320.

The previous prime is 144540551. The next prime is 144540577. The reversal of 144540561 is 165045441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144540561 - 2¹⁸ = 144278417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144540521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2189976 + ... + 2190041.

It is an arithmetic number, because the mean of its divisors is an integer number (26280108).

Almost surely, 2^144540561 is an apocalyptic number.

144540561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144540561 is a deficient number, since it is larger than the sum of its proper divisors (65700303).

144540561 is a wasteful number, since it uses less digits than its factorization.

144540561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4380031.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 144540561 is about 12022.5022769804. The cubic root of 144540561 is about 524.8033258781.

The spelling of 144540561 in words is "one hundred forty-four million, five hundred forty thousand, five hundred sixty-one".