1263211225 has 12 divisors (see below), whose sum is σ = 1567635280. Its totient is φ = 1009760400.

The previous prime is 1263211207. The next prime is 1263211237. The reversal of 1263211225 is 5221123621.

It is not a de Polignac number, because 1263211225 - 2⁷ = 1263211097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1263211225.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12706 + ... + 51844.

Almost surely, 2^1263211225 is an apocalyptic number.

It is an amenable number.

1263211225 is a deficient number, since it is larger than the sum of its proper divisors (304424055).

1263211225 is a wasteful number, since it uses less digits than its factorization.

1263211225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40440 (or 40435 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1263211225 is about 35541.6829230131. The cubic root of 1263211225 is about 1080.9990826316. Note that the first 3 decimals are identical.

Adding to 1263211225 its reverse (5221123621), we get a palindrome (6484334846).

The spelling of 1263211225 in words is "one billion, two hundred sixty-three million, two hundred eleven thousand, two hundred twenty-five".