8163261 has 20 divisors (see below), whose sum is σ = 12591744. Its totient is φ = 5265000.

The previous prime is 8163251. The next prime is 8163271. The reversal of 8163261 is 1623618.

It is an interprime number because it is at equal distance from previous prime (8163251) and next prime (8163271).

It is not a de Polignac number, because 8163261 - 2¹¹ = 8161213 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8163241) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 886 + ... + 4136.

Almost surely, 2^8163261 is an apocalyptic number.

8163261 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

8163261 is a deficient number, since it is larger than the sum of its proper divisors (4428483).

8163261 is a wasteful number, since it uses less digits than its factorization.

8163261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3294 (or 3285 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 8163261 is about 2857.1421035713. The cubic root of 8163261 is about 201.3513569404.

Adding to 8163261 its reverse (1623618), we get a palindrome (9786879).

The spelling of 8163261 in words is "eight million, one hundred sixty-three thousand, two hundred sixty-one".