144142402 has 4 divisors (see below), whose sum is σ = 216213606. Its totient is φ = 72071200.

The previous prime is 144142399. The next prime is 144142409. The reversal of 144142402 is 204241441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 204241441 = 823 ⋅248167.

It can be written as a sum of positive squares in only one way, i.e., 78872161 + 65270241 = 8881^2 + 8079^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (144142409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035599 + ... + 36035602.

Almost surely, 2^144142402 is an apocalyptic number.

144142402 is a deficient number, since it is larger than the sum of its proper divisors (72071204).

144142402 is an equidigital number, since it uses as much as digits as its factorization.

144142402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72071203.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 144142402 is about 12005.9319504985. The cubic root of 144142402 is about 524.3209991494.

Adding to 144142402 its reverse (204241441), we get a palindrome (348383843).

The spelling of 144142402 in words is "one hundred forty-four million, one hundred forty-two thousand, four hundred two".