100242555 has 32 divisors (see below), whose sum is σ = 184456704. Its totient is φ = 45536256.

The previous prime is 100242539. The next prime is 100242559. The reversal of 100242555 is 555242001.

It is a happy number.

It is not a de Polignac number, because 100242555 - 2⁴ = 100242539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100242559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14187 + ... + 20043.

It is an arithmetic number, because the mean of its divisors is an integer number (5764272).

Almost surely, 2^100242555 is an apocalyptic number.

100242555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

100242555 is a deficient number, since it is larger than the sum of its proper divisors (84214149).

100242555 is a wasteful number, since it uses less digits than its factorization.

100242555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 100242555 is about 10012.1204047894. The cubic root of 100242555 is about 464.5338605424.

Adding to 100242555 its reverse (555242001), we get a palindrome (655484556).

The spelling of 100242555 in words is "one hundred million, two hundred forty-two thousand, five hundred fifty-five".