144291561 has 4 divisors (see below), whose sum is σ = 192388752. Its totient is φ = 96194372.

The previous prime is 144291547. The next prime is 144291569. The reversal of 144291561 is 165192441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 144291561 - 2²⁵ = 110737129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144291569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24048591 + ... + 24048596.

It is an arithmetic number, because the mean of its divisors is an integer number (48097188).

Almost surely, 2^144291561 is an apocalyptic number.

It is an amenable number.

144291561 is a deficient number, since it is larger than the sum of its proper divisors (48097191).

144291561 is an equidigital number, since it uses as much as digits as its factorization.

144291561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48097190.

The product of its digits is 8640, while the sum is 33.

The square root of 144291561 is about 12012.1422319252. The cubic root of 144291561 is about 524.5017931281.

The spelling of 144291561 in words is "one hundred forty-four million, two hundred ninety-one thousand, five hundred sixty-one".