776261 has 4 divisors (see below), whose sum is σ = 779724. Its totient is φ = 772800.

The previous prime is 776257. The next prime is 776267. The reversal of 776261 is 162677.

776261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 591361 + 184900 = 769^2 + 430^2 .

It is a cyclic number.

It is not a de Polignac number, because 776261 - 2² = 776257 is a prime.

It is a super-2 number, since 2×776261² = 1205162280242, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 776261.

It is not an unprimeable number, because it can be changed into a prime (776267) 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, 1370 + ... + 1851.

It is an arithmetic number, because the mean of its divisors is an integer number (194931).

2⁷⁷⁶²⁶¹ is an apocalyptic number.

It is an amenable number.

776261 is a deficient number, since it is larger than the sum of its proper divisors (3463).

776261 is a wasteful number, since it uses less digits than its factorization.

776261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3462.

The product of its digits is 3528, while the sum is 29.

The square root of 776261 is about 881.0567518611. The cubic root of 776261 is about 91.9043192403.

The spelling of 776261 in words is "seven hundred seventy-six thousand, two hundred sixty-one".