100242539 has 2 divisors, whose sum is σ = 100242540. Its totient is φ = 100242538.

The previous prime is 100242529. The next prime is 100242559. The reversal of 100242539 is 935242001.

It is a weak prime.

It is an emirp because it is prime and its reverse (935242001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100242539 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (100242529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50121269 + 50121270.

It is an arithmetic number, because the mean of its divisors is an integer number (50121270).

Almost surely, 2^100242539 is an apocalyptic number.

100242539 is a deficient number, since it is larger than the sum of its proper divisors (1).

100242539 is an equidigital number, since it uses as much as digits as its factorization.

100242539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 100242539 is about 10012.1196057578. The cubic root of 100242539 is about 464.5338358272.

The spelling of 100242539 in words is "one hundred million, two hundred forty-two thousand, five hundred thirty-nine".