101242505 has 16 divisors (see below), whose sum is σ = 149528064. Its totient is φ = 64082880.

The previous prime is 101242499. The next prime is 101242517. The reversal of 101242505 is 505242101.

It is not a de Polignac number, because 101242505 - 2⁶ = 101242441 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 110801 + ... + 111710.

It is an arithmetic number, because the mean of its divisors is an integer number (9345504).

Almost surely, 2^101242505 is an apocalyptic number.

It is an amenable number.

101242505 is a deficient number, since it is larger than the sum of its proper divisors (48285559).

101242505 is a wasteful number, since it uses less digits than its factorization.

101242505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222536.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 101242505 is about 10061.9334623123. The cubic root of 101242505 is about 466.0733750129.

Adding to 101242505 its reverse (505242101), we get a palindrome (606484606).

The spelling of 101242505 in words is "one hundred one million, two hundred forty-two thousand, five hundred five".