7865261 has 2 divisors, whose sum is σ = 7865262. Its totient is φ = 7865260.

The previous prime is 7865257. The next prime is 7865267. The reversal of 7865261 is 1625687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5244100 + 2621161 = 2290^2 + 1619^2 .

It is a cyclic number.

It is not a de Polignac number, because 7865261 - 2² = 7865257 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7865267) 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 as a sum of consecutive naturals, namely, 3932630 + 3932631.

It is an arithmetic number, because the mean of its divisors is an integer number (3932631).

Almost surely, 2^7865261 is an apocalyptic number.

It is an amenable number.

7865261 is a deficient number, since it is larger than the sum of its proper divisors (1).

7865261 is an equidigital number, since it uses as much as digits as its factorization.

7865261 is an odious number, because the sum of its binary digits is odd.

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

The square root of 7865261 is about 2804.5072651002. The cubic root of 7865261 is about 198.8708116668.

The spelling of 7865261 in words is "seven million, eight hundred sixty-five thousand, two hundred sixty-one".