102281861 has 4 divisors (see below), whose sum is σ = 111580224. Its totient is φ = 92983500.

The previous prime is 102281857. The next prime is 102281909. The reversal of 102281861 is 168182201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 102281861 - 2² = 102281857 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102281831) 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 in 3 ways as a sum of consecutive naturals, for example, 4649165 + ... + 4649186.

It is an arithmetic number, because the mean of its divisors is an integer number (27895056).

Almost surely, 2^102281861 is an apocalyptic number.

102281861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102281861 is a deficient number, since it is larger than the sum of its proper divisors (9298363).

102281861 is an equidigital number, since it uses as much as digits as its factorization.

102281861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9298362.

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 102281861 is about 10113.4495104292. The cubic root of 102281861 is about 467.6628519360.

The spelling of 102281861 in words is "one hundred two million, two hundred eighty-one thousand, eight hundred sixty-one".