1204209943225 has 81 divisors (see below), whose sum is σ = 1575549379957. Its totient is φ = 913007680000.

The previous prime is 1204209943213. The next prime is 1204209943247. The reversal of 1204209943225 is 5223499024021.

The square root of 1204209943225 is 1097365.

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

It can be written as a sum of positive squares in 40 ways, for example, as 1189990811689 + 14219131536 = 1090867^2 + 119244^2 .

It is not a de Polignac number, because 1204209943225 - 2¹⁷ = 1204209812153 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 11922870675 + ... + 11922870775.

Almost surely, 2^{1204209943225} is an apocalyptic number.

1204209943225 is the 1097365-th square number.

1204209943225 is the 548683-rd centered octagonal number.

It is an amenable number.

1204209943225 is a deficient number, since it is larger than the sum of its proper divisors (371339436732).

1204209943225 is an frugal number, since it uses more digits than its factorization.

1204209943225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 1204209943225 in words is "one trillion, two hundred four billion, two hundred nine million, nine hundred forty-three thousand, two hundred twenty-five".