144045661 has 4 divisors (see below), whose sum is σ = 144148032. Its totient is φ = 143943292.

The previous prime is 144045659. The next prime is 144045689. The reversal of 144045661 is 166540441.

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: 166540441 = 37 ⋅4501093.

It is a cyclic number.

It is not a de Polignac number, because 144045661 - 2¹ = 144045659 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144045961) 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, 49045 + ... + 51898.

It is an arithmetic number, because the mean of its divisors is an integer number (36037008).

Almost surely, 2^144045661 is an apocalyptic number.

It is an amenable number.

144045661 is a deficient number, since it is larger than the sum of its proper divisors (102371).

144045661 is a wasteful number, since it uses less digits than its factorization.

144045661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102370.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 144045661 is about 12001.9023908712. The cubic root of 144045661 is about 524.2036737616.

The spelling of 144045661 in words is "one hundred forty-four million, forty-five thousand, six hundred sixty-one".