144652561 has 4 divisors (see below), whose sum is σ = 145518912. Its totient is φ = 143786212.

The previous prime is 144652549. The next prime is 144652577. The reversal of 144652561 is 165256441.

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, and also an emirpimes, since its reverse is a distinct semiprime: 165256441 = 7 ⋅23608063.

It is a cyclic number.

It is not a de Polignac number, because 144652561 - 2⁷ = 144652433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144652591) 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, 432925 + ... + 433258.

It is an arithmetic number, because the mean of its divisors is an integer number (36379728).

Almost surely, 2^144652561 is an apocalyptic number.

It is an amenable number.

144652561 is a deficient number, since it is larger than the sum of its proper divisors (866351).

144652561 is an equidigital number, since it uses as much as digits as its factorization.

144652561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 866350.

The product of its digits is 28800, while the sum is 34.

The square root of 144652561 is about 12027.1593071681. The cubic root of 144652561 is about 524.9388421579.

The spelling of 144652561 in words is "one hundred forty-four million, six hundred fifty-two thousand, five hundred sixty-one".