674181225 has 45 divisors (see below), whose sum is σ = 1250984757. Its totient is φ = 358940160.

The previous prime is 674181217. The next prime is 674181227. The reversal of 674181225 is 522181476.

The square root of 674181225 is 25965.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 190357209 + 483824016 = 13797^2 + 21996^2 .

It is a tau number, because it is divible by the number of its divisors (45).

It is not a de Polignac number, because 674181225 - 2³ = 674181217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 674181225.

It is not an unprimeable number, because it can be changed into a prime (674181227) 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 44 ways as a sum of consecutive naturals, for example, 1168137 + ... + 1168713.

Almost surely, 2^674181225 is an apocalyptic number.

674181225 is the 25965-th square number.

674181225 is the 12983-rd centered octagonal number.

It is an amenable number.

674181225 is a deficient number, since it is larger than the sum of its proper divisors (576803532).

674181225 is an frugal number, since it uses more digits than its factorization.

674181225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176 (or 585 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The cubic root of 674181225 is about 876.8504946052.

Multiplying 674181225 by its sum of digits (36), we get a square (24270524100 = 155790²).

The spelling of 674181225 in words is "six hundred seventy-four million, one hundred eighty-one thousand, two hundred twenty-five".