100505247 has 16 divisors (see below), whose sum is σ = 136797792. Its totient is φ = 65617920.

The previous prime is 100505243. The next prime is 100505287. The reversal of 100505247 is 742505001.

It is not a de Polignac number, because 100505247 - 2² = 100505243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100505243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45963 + ... + 48099.

It is an arithmetic number, because the mean of its divisors is an integer number (8549862).

Almost surely, 2^100505247 is an apocalyptic number.

100505247 is a deficient number, since it is larger than the sum of its proper divisors (36292545).

100505247 is a wasteful number, since it uses less digits than its factorization.

100505247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2458.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 100505247 is about 10025.2305210404. The cubic root of 100505247 is about 464.9392867894.

The spelling of 100505247 in words is "one hundred million, five hundred five thousand, two hundred forty-seven".