8158261 has 16 divisors (see below), whose sum is σ = 8908416. Its totient is φ = 7451136.

The previous prime is 8158259. The next prime is 8158279. The reversal of 8158261 is 1628518.

It is a cyclic number.

It is not a de Polignac number, because 8158261 - 2¹ = 8158259 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 (8158211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72141 + ... + 72253.

It is an arithmetic number, because the mean of its divisors is an integer number (556776).

Almost surely, 2^8158261 is an apocalyptic number.

It is an amenable number.

8158261 is a deficient number, since it is larger than the sum of its proper divisors (750155).

8158261 is a wasteful number, since it uses less digits than its factorization.

8158261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252.

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

The square root of 8158261 is about 2856.2669693150. The cubic root of 8158261 is about 201.3102392874.

The spelling of 8158261 in words is "eight million, one hundred fifty-eight thousand, two hundred sixty-one".