1297147556 has 12 divisors (see below), whose sum is σ = 2389482480. Its totient is φ = 614438280.

The previous prime is 1297147529. The next prime is 1297147559. The reversal of 1297147556 is 6557417921.

It is a self number, because there is not a number n which added to its sum of digits gives 1297147556.

It is not an unprimeable number, because it can be changed into a prime (1297147559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8533790 + ... + 8533941.

It is an arithmetic number, because the mean of its divisors is an integer number (199123540).

Almost surely, 2^1297147556 is an apocalyptic number.

It is an amenable number.

1297147556 is a deficient number, since it is larger than the sum of its proper divisors (1092334924).

1297147556 is a wasteful number, since it uses less digits than its factorization.

1297147556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17067754 (or 17067752 counting only the distinct ones).

The product of its digits is 529200, while the sum is 47.

The square root of 1297147556 is about 36015.9347511626. The cubic root of 1297147556 is about 1090.5940582416.

The spelling of 1297147556 in words is "one billion, two hundred ninety-seven million, one hundred forty-seven thousand, five hundred fifty-six".