144591442 has 4 divisors (see below), whose sum is σ = 216887166. Its totient is φ = 72295720.

The previous prime is 144591431. The next prime is 144591451. The reversal of 144591442 is 244195441.

It is a happy number.

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., 119880601 + 24710841 = 10949^2 + 4971^2 .

It is a junction number, because it is equal to n+sod(n) for n = 144591398 and 144591407.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36147859 + ... + 36147862.

Almost surely, 2^144591442 is an apocalyptic number.

144591442 is a deficient number, since it is larger than the sum of its proper divisors (72295724).

144591442 is an equidigital number, since it uses as much as digits as its factorization.

144591442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72295723.

The product of its digits is 23040, while the sum is 34.

The square root of 144591442 is about 12024.6181644159. The cubic root of 144591442 is about 524.8648988723.

The spelling of 144591442 in words is "one hundred forty-four million, five hundred ninety-one thousand, four hundred forty-two".