142408317 has 4 divisors (see below), whose sum is σ = 189877760. Its totient is φ = 94938876.

The previous prime is 142408309. The next prime is 142408339. The reversal of 142408317 is 713804241.

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.

It is not a de Polignac number, because 142408317 - 2³ = 142408309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142408367) 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, 23734717 + ... + 23734722.

It is an arithmetic number, because the mean of its divisors is an integer number (47469440).

Almost surely, 2^142408317 is an apocalyptic number.

It is an amenable number.

142408317 is a deficient number, since it is larger than the sum of its proper divisors (47469443).

142408317 is an equidigital number, since it uses as much as digits as its factorization.

142408317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47469442.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 142408317 is about 11933.4955901446. The cubic root of 142408317 is about 522.2099205609.

The spelling of 142408317 in words is "one hundred forty-two million, four hundred eight thousand, three hundred seventeen".