1671161225 has 12 divisors (see below), whose sum is σ = 2077807116. Its totient is φ = 1333337280.

The previous prime is 1671161197. The next prime is 1671161231. The reversal of 1671161225 is 5221611761.

It can be written as a sum of positive squares in 6 ways, for example, as 21501769 + 1649659456 = 4637^2 + 40616^2 .

It is not a de Polignac number, because 1671161225 - 2⁶ = 1671161161 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1671161191 and 1671161200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80282 + ... + 98931.

It is an arithmetic number, because the mean of its divisors is an integer number (173150593).

Almost surely, 2^1671161225 is an apocalyptic number.

It is an amenable number.

1671161225 is a deficient number, since it is larger than the sum of its proper divisors (406645891).

1671161225 is a wasteful number, since it uses less digits than its factorization.

1671161225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179596 (or 179591 counting only the distinct ones).

The product of its digits is 5040, while the sum is 32.

The square root of 1671161225 is about 40879.8388573145. The cubic root of 1671161225 is about 1186.6959225190.

Adding to 1671161225 its reverse (5221611761), we get a palindrome (6892772986).

The spelling of 1671161225 in words is "one billion, six hundred seventy-one million, one hundred sixty-one thousand, two hundred twenty-five".