770561 has 4 divisors (see below), whose sum is σ = 840624. Its totient is φ = 700500.

The previous prime is 770557. The next prime is 770573. The reversal of 770561 is 165077.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 770561 - 2² = 770557 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 770561.

It is not an unprimeable number, because it can be changed into a prime (770551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35015 + ... + 35036.

It is an arithmetic number, because the mean of its divisors is an integer number (210156).

2⁷⁷⁰⁵⁶¹ is an apocalyptic number.

It is an amenable number.

770561 is a deficient number, since it is larger than the sum of its proper divisors (70063).

770561 is a wasteful number, since it uses less digits than its factorization.

770561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70062.

The product of its (nonzero) digits is 1470, while the sum is 26.

The square root of 770561 is about 877.8160399537. The cubic root of 770561 is about 91.6788185910.

It can be divided in two parts, 770 and 561, that added together give a palindrome (1331).

The spelling of 770561 in words is "seven hundred seventy thousand, five hundred sixty-one".