8102261 has 4 divisors (see below), whose sum is σ = 8111532. Its totient is φ = 8092992.

The previous prime is 8102257. The next prime is 8102287. The reversal of 8102261 is 1622018.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4972900 + 3129361 = 2230^2 + 1769^2 .

It is a cyclic number.

It is not a de Polignac number, because 8102261 - 2² = 8102257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8102221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3170 + ... + 5123.

It is an arithmetic number, because the mean of its divisors is an integer number (2027883).

Almost surely, 2^8102261 is an apocalyptic number.

It is an amenable number.

8102261 is a deficient number, since it is larger than the sum of its proper divisors (9271).

8102261 is an equidigital number, since it uses as much as digits as its factorization.

8102261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 8102261 is about 2846.4470836466. The cubic root of 8102261 is about 200.8485695566.

Adding to 8102261 its reverse (1622018), we get a palindrome (9724279).

The spelling of 8102261 in words is "eight million, one hundred two thousand, two hundred sixty-one".