101242513 has 4 divisors (see below), whose sum is σ = 101267428. Its totient is φ = 101217600.

The previous prime is 101242499. The next prime is 101242517. The reversal of 101242513 is 315242101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315242101 = 17 ⋅18543653.

It can be written as a sum of positive squares in 2 ways, for example, as 300304 + 100942209 = 548^2 + 10047^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101242513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101242517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4788 + ... + 15013.

It is an arithmetic number, because the mean of its divisors is an integer number (25316857).

Almost surely, 2^101242513 is an apocalyptic number.

It is an amenable number.

101242513 is a deficient number, since it is larger than the sum of its proper divisors (24915).

101242513 is an equidigital number, since it uses as much as digits as its factorization.

101242513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24914.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 101242513 is about 10061.9338598502. The cubic root of 101242513 is about 466.0733872890.

Adding to 101242513 its reverse (315242101), we get a palindrome (416484614).

The spelling of 101242513 in words is "one hundred one million, two hundred forty-two thousand, five hundred thirteen".