775641 has 8 divisors (see below), whose sum is σ = 1056384. Its totient is φ = 506000.

The previous prime is 775639. The next prime is 775661. The reversal of 775641 is 146577.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 775641 - 2¹ = 775639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 775599 and 775608.

It is not an unprimeable number, because it can be changed into a prime (775601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2610 + ... + 2891.

It is an arithmetic number, because the mean of its divisors is an integer number (132048).

2⁷⁷⁵⁶⁴¹ is an apocalyptic number.

It is an amenable number.

775641 is a deficient number, since it is larger than the sum of its proper divisors (280743).

775641 is a wasteful number, since it uses less digits than its factorization.

775641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5551.

The product of its digits is 5880, while the sum is 30.

The square root of 775641 is about 880.7048313709. The cubic root of 775641 is about 91.8798447165.

The spelling of 775641 in words is "seven hundred seventy-five thousand, six hundred forty-one".