8657261 has 4 divisors (see below), whose sum is σ = 8663292. Its totient is φ = 8651232.

The previous prime is 8657249. The next prime is 8657291. The reversal of 8657261 is 1627568.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1012036 + 7645225 = 1006^2 + 2765^2 .

It is a cyclic number.

It is not a de Polignac number, because 8657261 - 2²² = 4462957 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 (8657221) 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, 521 + ... + 4193.

It is an arithmetic number, because the mean of its divisors is an integer number (2165823).

Almost surely, 2^8657261 is an apocalyptic number.

It is an amenable number.

8657261 is a deficient number, since it is larger than the sum of its proper divisors (6031).

8657261 is a wasteful number, since it uses less digits than its factorization.

8657261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030.

The product of its digits is 20160, while the sum is 35.

The square root of 8657261 is about 2942.3223820649. The cubic root of 8657261 is about 205.3336703650. Note that the first 3 decimals are identical.

The spelling of 8657261 in words is "eight million, six hundred fifty-seven thousand, two hundred sixty-one".