142280217 has 12 divisors (see below), whose sum is σ = 206706084. Its totient is φ = 94304160.

The previous prime is 142280213. The next prime is 142280239. The reversal of 142280217 is 712082241.

It can be written as a sum of positive squares in 2 ways, for example, as 123409881 + 18870336 = 11109^2 + 4344^2 .

It is not a de Polignac number, because 142280217 - 2² = 142280213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (142280213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44134 + ... + 47247.

It is an arithmetic number, because the mean of its divisors is an integer number (17225507).

Almost surely, 2^142280217 is an apocalyptic number.

It is an amenable number.

142280217 is a deficient number, since it is larger than the sum of its proper divisors (64425867).

142280217 is a wasteful number, since it uses less digits than its factorization.

142280217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91560 (or 91557 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 142280217 is about 11928.1271371494. The cubic root of 142280217 is about 522.0532931012.

The spelling of 142280217 in words is "one hundred forty-two million, two hundred eighty thousand, two hundred seventeen".