142005517 has 2 divisors, whose sum is σ = 142005518. Its totient is φ = 142005516.

The previous prime is 142005503. The next prime is 142005551. The reversal of 142005517 is 715500241.

142005517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90079081 + 51926436 = 9491^2 + 7206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142005517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 142005491 and 142005500.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142005557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71002758 + 71002759.

It is an arithmetic number, because the mean of its divisors is an integer number (71002759).

Almost surely, 2^142005517 is an apocalyptic number.

It is an amenable number.

142005517 is a deficient number, since it is larger than the sum of its proper divisors (1).

142005517 is an equidigital number, since it uses as much as digits as its factorization.

142005517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 142005517 is about 11916.6067737423. The cubic root of 142005517 is about 521.7171010565.

Adding to 142005517 its reverse (715500241), we get a palindrome (857505758).

The spelling of 142005517 in words is "one hundred forty-two million, five thousand, five hundred seventeen".