1247125225 has 24 divisors (see below), whose sum is σ = 1561642112. Its totient is φ = 987940800.

The previous prime is 1247125199. The next prime is 1247125237. The reversal of 1247125225 is 5225217421.

It is a happy number.

It is not a de Polignac number, because 1247125225 - 2²⁹ = 710254313 is a prime.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 1886395 + ... + 1887055.

Almost surely, 2^1247125225 is an apocalyptic number.

It is an amenable number.

1247125225 is a deficient number, since it is larger than the sum of its proper divisors (314516887).

1247125225 is a wasteful number, since it uses less digits than its factorization.

1247125225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1297 (or 1292 counting only the distinct ones).

The product of its digits is 11200, while the sum is 31.

The square root of 1247125225 is about 35314.6601994129. The cubic root of 1247125225 is about 1076.3909091424.

The spelling of 1247125225 in words is "one billion, two hundred forty-seven million, one hundred twenty-five thousand, two hundred twenty-five".