1247149225 has 27 divisors (see below), whose sum is σ = 1800733797. Its totient is φ = 854340480.

The previous prime is 1247149177. The next prime is 1247149229. The reversal of 1247149225 is 5229417421.

The square root of 1247149225 is 35315.

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 138791961 + 1108357264 = 11781^2 + 33292^2 .

It is not a de Polignac number, because 1247149225 - 2⁷ = 1247149097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1247149229) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 1235521 + ... + 1236529.

Almost surely, 2^1247149225 is an apocalyptic number.

1247149225 is the 35315-th square number.

1247149225 is the 17658-th centered octagonal number.

It is an amenable number.

1247149225 is a deficient number, since it is larger than the sum of its proper divisors (553584572).

1247149225 is an frugal number, since it uses more digits than its factorization.

1247149225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2042 (or 1021 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The cubic root of 1247149225 is about 1076.3978138797.

The spelling of 1247149225 in words is "one billion, two hundred forty-seven million, one hundred forty-nine thousand, two hundred twenty-five".