100252861 has 2 divisors, whose sum is σ = 100252862. Its totient is φ = 100252860.

The previous prime is 100252849. The next prime is 100252877. The reversal of 100252861 is 168252001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 352836 = 9995^2 + 594^2 .

It is an emirp because it is prime and its reverse (168252001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100252861 is a prime.

It is a super-2 number, since 2×100252861² = 20101272277370642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100252891) 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 as a sum of consecutive naturals, namely, 50126430 + 50126431.

It is an arithmetic number, because the mean of its divisors is an integer number (50126431).

Almost surely, 2^100252861 is an apocalyptic number.

It is an amenable number.

100252861 is a deficient number, since it is larger than the sum of its proper divisors (1).

100252861 is an equidigital number, since it uses as much as digits as its factorization.

100252861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 100252861 is about 10012.6350677531. The cubic root of 100252861 is about 464.5497796694.

The spelling of 100252861 in words is "one hundred million, two hundred fifty-two thousand, eight hundred sixty-one".