142438617 has 6 divisors (see below), whose sum is σ = 205744682. Its totient is φ = 94959072.

The previous prime is 142438607. The next prime is 142438627. The reversal of 142438617 is 716834241.

142438617 is a `hidden beast` number, since 1 + 4 + 2 + 4 + 38 + 617 = 666.

It is an interprime number because it is at equal distance from previous prime (142438607) and next prime (142438627).

It can be written as a sum of positive squares in only one way, i.e., 141991056 + 447561 = 11916^2 + 669^2 .

It is not a de Polignac number, because 142438617 - 2⁴ = 142438601 is a prime.

It is a super-3 number, since 3×142438617³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142438607) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7913248 + ... + 7913265.

Almost surely, 2^142438617 is an apocalyptic number.

It is an amenable number.

142438617 is a deficient number, since it is larger than the sum of its proper divisors (63306065).

142438617 is a wasteful number, since it uses less digits than its factorization.

142438617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15826519 (or 15826516 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 142438617 is about 11934.7650584333. The cubic root of 142438617 is about 522.2469545368.

The spelling of 142438617 in words is "one hundred forty-two million, four hundred thirty-eight thousand, six hundred seventeen".