7768261 has 4 divisors (see below), whose sum is σ = 7978252. Its totient is φ = 7558272.

The previous prime is 7768253. The next prime is 7768331. The reversal of 7768261 is 1628677.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1628677 = 953 ⋅1709.

It can be written as a sum of positive squares in 2 ways, for example, as 3744225 + 4024036 = 1935^2 + 2006^2 .

It is a 5-Lehmer number, since φ(7768261) divides (7768261-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 7768261 - 2³ = 7768253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 209953 = 7768261 / (7 + 7 + 6 + 8 + 2 + 6 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7768261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7768361) 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 in 3 ways as a sum of consecutive naturals, for example, 104940 + ... + 105013.

It is an arithmetic number, because the mean of its divisors is an integer number (1994563).

Almost surely, 2^7768261 is an apocalyptic number.

It is an amenable number.

7768261 is a deficient number, since it is larger than the sum of its proper divisors (209991).

7768261 is a wasteful number, since it uses less digits than its factorization.

7768261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209990.

The product of its digits is 28224, while the sum is 37.

The square root of 7768261 is about 2787.1600241106. The cubic root of 7768261 is about 198.0498887994.

The spelling of 7768261 in words is "seven million, seven hundred sixty-eight thousand, two hundred sixty-one".