771872 has 12 divisors (see below), whose sum is σ = 1519686. Its totient is φ = 385920.

The previous prime is 771863. The next prime is 771877. The reversal of 771872 is 278177.

It can be written as a sum of positive squares in only one way, i.e., 712336 + 59536 = 844^2 + 244^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 24121 = 771872 / (7 + 7 + 1 + 8 + 7 + 2).

It is not an unprimeable number, because it can be changed into a prime (771877) by changing a digit.

771872 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12029 + ... + 12092.

2⁷⁷¹⁸⁷² is an apocalyptic number.

It is an amenable number.

771872 is a deficient number, since it is larger than the sum of its proper divisors (747814).

771872 is a wasteful number, since it uses less digits than its factorization.

771872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24131 (or 24123 counting only the distinct ones).

The product of its digits is 5488, while the sum is 32.

The square root of 771872 is about 878.5624622074. The cubic root of 771872 is about 91.7307819584.

The spelling of 771872 in words is "seven hundred seventy-one thousand, eight hundred seventy-two".