142420017 has 4 divisors (see below), whose sum is σ = 189893360. Its totient is φ = 94946676.

The previous prime is 142420013. The next prime is 142420021. The reversal of 142420017 is 710024241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 710024241 = 3 ⋅236674747.

It is an interprime number because it is at equal distance from previous prime (142420013) and next prime (142420021).

It is not a de Polignac number, because 142420017 - 2² = 142420013 is a prime.

It is a super-2 number, since 2×142420017² = 40566922484560578, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142419975 and 142420002.

It is not an unprimeable number, because it can be changed into a prime (142420013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23736667 + ... + 23736672.

It is an arithmetic number, because the mean of its divisors is an integer number (47473340).

Almost surely, 2^142420017 is an apocalyptic number.

It is an amenable number.

142420017 is a deficient number, since it is larger than the sum of its proper divisors (47473343).

142420017 is an equidigital number, since it uses as much as digits as its factorization.

142420017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47473342.

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

The square root of 142420017 is about 11933.9857968744. The cubic root of 142420017 is about 522.2242214316.

Adding to 142420017 its reverse (710024241), we get a palindrome (852444258).

The spelling of 142420017 in words is "one hundred forty-two million, four hundred twenty thousand, seventeen".