771225 has 48 divisors (see below), whose sum is σ = 1583232. Its totient is φ = 322560.

The previous prime is 771217. The next prime is 771227. The reversal of 771225 is 522177.

771225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 771225 - 2³ = 771217 is a prime.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

771225 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 771195 and 771204.

It is not an unprimeable number, because it can be changed into a prime (771227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6769 + ... + 6881.

It is an arithmetic number, because the mean of its divisors is an integer number (32984).

2⁷⁷¹²²⁵ is an apocalyptic number.

771225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

771225 is an abundant number, since it is smaller than the sum of its proper divisors (812007).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

771225 is a wasteful number, since it uses less digits than its factorization.

771225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 141 counting only the distinct ones).

The product of its digits is 980, while the sum is 24.

The square root of 771225 is about 878.1941698736. The cubic root of 771225 is about 91.7051445442.

The spelling of 771225 in words is "seven hundred seventy-one thousand, two hundred twenty-five".