100885261 has 2 divisors, whose sum is σ = 100885262. Its totient is φ = 100885260.

The previous prime is 100885241. The next prime is 100885303. The reversal of 100885261 is 162588001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88247236 + 12638025 = 9394^2 + 3555^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100885261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100885241) 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 as a sum of consecutive naturals, namely, 50442630 + 50442631.

It is an arithmetic number, because the mean of its divisors is an integer number (50442631).

Almost surely, 2^100885261 is an apocalyptic number.

It is an amenable number.

100885261 is a deficient number, since it is larger than the sum of its proper divisors (1).

100885261 is an equidigital number, since it uses as much as digits as its factorization.

100885261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 100885261 is about 10044.1655203407. The cubic root of 100885261 is about 465.5245339210.

The spelling of 100885261 in words is "one hundred million, eight hundred eighty-five thousand, two hundred sixty-one".