142407217 has 8 divisors (see below), whose sum is σ = 144426240. Its totient is φ = 140393760.

The previous prime is 142407203. The next prime is 142407257. The reversal of 142407217 is 712704241.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142407217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142407257) 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, 93492 + ... + 95002.

It is an arithmetic number, because the mean of its divisors is an integer number (18053280).

Almost surely, 2^142407217 is an apocalyptic number.

It is an amenable number.

142407217 is a deficient number, since it is larger than the sum of its proper divisors (2019023).

142407217 is a wasteful number, since it uses less digits than its factorization.

142407217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2783.

The product of its (nonzero) digits is 3136, while the sum is 28.

The square root of 142407217 is about 11933.4495012968. The cubic root of 142407217 is about 522.2085759944.

The spelling of 142407217 in words is "one hundred forty-two million, four hundred seven thousand, two hundred seventeen".