1247102725 has 12 divisors (see below), whose sum is σ = 1686990240. Its totient is φ = 906983600.

The previous prime is 1247102719. The next prime is 1247102729. The reversal of 1247102725 is 5272017421.

It is not a de Polignac number, because 1247102725 - 2¹¹ = 1247100677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1247102729) 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 11 ways as a sum of consecutive naturals, for example, 2267185 + ... + 2267734.

It is an arithmetic number, because the mean of its divisors is an integer number (140582520).

Almost surely, 2^1247102725 is an apocalyptic number.

It is an amenable number.

1247102725 is a deficient number, since it is larger than the sum of its proper divisors (439887515).

1247102725 is a wasteful number, since it uses less digits than its factorization.

1247102725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4534940 (or 4534935 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 1247102725 is about 35314.3416333931. The cubic root of 1247102725 is about 1076.3844358707.

The spelling of 1247102725 in words is "one billion, two hundred forty-seven million, one hundred two thousand, seven hundred twenty-five".