144840961 has 4 divisors (see below), whose sum is σ = 144870192. Its totient is φ = 144811732.

The previous prime is 144840947. The next prime is 144840967. The reversal of 144840961 is 169048441.

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 a de Polignac number, because none of the positive numbers 2^k-144840961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144840961.

It is not an unprimeable number, because it can be changed into a prime (144840967) 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, 5131 + ... + 17776.

It is an arithmetic number, because the mean of its divisors is an integer number (36217548).

Almost surely, 2^144840961 is an apocalyptic number.

It is an amenable number.

144840961 is a deficient number, since it is larger than the sum of its proper divisors (29231).

144840961 is an equidigital number, since it uses as much as digits as its factorization.

144840961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29230.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 144840961 is about 12034.9890319850. The cubic root of 144840961 is about 525.1666421868.

The spelling of 144840961 in words is "one hundred forty-four million, eight hundred forty thousand, nine hundred sixty-one".