142502117 has 4 divisors (see below), whose sum is σ = 143225676. Its totient is φ = 141778560.

The previous prime is 142502111. The next prime is 142502123. The reversal of 142502117 is 711205241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 711205241 = 23 ⋅30921967.

It is an interprime number because it is at equal distance from previous prime (142502111) and next prime (142502123).

It can be written as a sum of positive squares in 2 ways, for example, as 137147521 + 5354596 = 11711^2 + 2314^2 .

It is a cyclic number.

It is not a de Polignac number, because 142502117 - 2⁶ = 142502053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142502092 and 142502101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142502111) 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, 361484 + ... + 361877.

It is an arithmetic number, because the mean of its divisors is an integer number (35806419).

Almost surely, 2^142502117 is an apocalyptic number.

It is an amenable number.

142502117 is a deficient number, since it is larger than the sum of its proper divisors (723559).

142502117 is an equidigital number, since it uses as much as digits as its factorization.

142502117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723558.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 142502117 is about 11937.4250573564. The cubic root of 142502117 is about 522.3245499611.

Adding to 142502117 its reverse (711205241), we get a palindrome (853707358).

The spelling of 142502117 in words is "one hundred forty-two million, five hundred two thousand, one hundred seventeen".