142240017 has 8 divisors (see below), whose sum is σ = 191531520. Its totient is φ = 93887600.

The previous prime is 142240009. The next prime is 142240039. The reversal of 142240017 is 710042241.

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 142240017 - 2³ = 142240009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142239975 and 142240002.

It is not an unprimeable number, because it can be changed into a prime (142241017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234417 + ... + 235022.

It is an arithmetic number, because the mean of its divisors is an integer number (23941440).

Almost surely, 2^142240017 is an apocalyptic number.

It is an amenable number.

142240017 is a deficient number, since it is larger than the sum of its proper divisors (49291503).

142240017 is a wasteful number, since it uses less digits than its factorization.

142240017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469543.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 142240017 is about 11926.4419254026. The cubic root of 142240017 is about 522.0041213104.

Adding to 142240017 its reverse (710042241), we get a palindrome (852282258).

The spelling of 142240017 in words is "one hundred forty-two million, two hundred forty thousand, seventeen".