144690242 has 8 divisors (see below), whose sum is σ = 217087932. Its totient is φ = 72327600.

The previous prime is 144690241. The next prime is 144690253. The reversal of 144690242 is 242096441.

It can be written as a sum of positive squares in 2 ways, for example, as 138039001 + 6651241 = 11749^2 + 2579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×144690242² = 41870532260037128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 144690199 and 144690208.

It is not an unprimeable number, because it can be changed into a prime (144690241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7892 + ... + 18752.

Almost surely, 2^144690242 is an apocalyptic number.

144690242 is a deficient number, since it is larger than the sum of its proper divisors (72397690).

144690242 is a wasteful number, since it uses less digits than its factorization.

144690242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17524.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 144690242 is about 12028.7257014199. The cubic root of 144690242 is about 524.9844191899.

The spelling of 144690242 in words is "one hundred forty-four million, six hundred ninety thousand, two hundred forty-two".