144145994 has 4 divisors (see below), whose sum is σ = 216218994. Its totient is φ = 72072996.

The previous prime is 144145973. The next prime is 144145997. The reversal of 144145994 is 499541441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 110355025 + 33790969 = 10505^2 + 5813^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144145997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36036497 + ... + 36036500.

Almost surely, 2^144145994 is an apocalyptic number.

144145994 is a deficient number, since it is larger than the sum of its proper divisors (72073000).

144145994 is an equidigital number, since it uses as much as digits as its factorization.

144145994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72072999.

The product of its digits is 103680, while the sum is 41.

The square root of 144145994 is about 12006.0815422851. The cubic root of 144145994 is about 524.3253544382.

The spelling of 144145994 in words is "one hundred forty-four million, one hundred forty-five thousand, nine hundred ninety-four".