142005441 has 8 divisors (see below), whose sum is σ = 190786464. Its totient is φ = 93947360.

The previous prime is 142005433. The next prime is 142005443. The reversal of 142005441 is 144500241.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 142005441 - 2³ = 142005433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142005443) 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 7 ways as a sum of consecutive naturals, for example, 180276 + ... + 181061.

It is an arithmetic number, because the mean of its divisors is an integer number (23848308).

Almost surely, 2^142005441 is an apocalyptic number.

It is an amenable number.

142005441 is a deficient number, since it is larger than the sum of its proper divisors (48781023).

142005441 is a wasteful number, since it uses less digits than its factorization.

142005441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361471.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 142005441 is about 11916.6035849146. The cubic root of 142005441 is about 521.7170079838.

Adding to 142005441 its reverse (144500241), we get a palindrome (286505682).

The spelling of 142005441 in words is "one hundred forty-two million, five thousand, four hundred forty-one".