144987422 has 4 divisors (see below), whose sum is σ = 217481136. Its totient is φ = 72493710.

The previous prime is 144987421. The next prime is 144987431. The reversal of 144987422 is 224789441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 224789441 = 2879 ⋅78079.

It is a self number, because there is not a number n which added to its sum of digits gives 144987422.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144987421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36246854 + ... + 36246857.

It is an arithmetic number, because the mean of its divisors is an integer number (54370284).

Almost surely, 2^144987422 is an apocalyptic number.

144987422 is a deficient number, since it is larger than the sum of its proper divisors (72493714).

144987422 is an equidigital number, since it uses as much as digits as its factorization.

144987422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72493713.

The product of its digits is 129024, while the sum is 41.

The square root of 144987422 is about 12041.0722944429. The cubic root of 144987422 is about 525.3435960909.

The spelling of 144987422 in words is "one hundred forty-four million, nine hundred eighty-seven thousand, four hundred twenty-two".