1297561552 has 60 divisors (see below), whose sum is σ = 2929488096. Its totient is φ = 555145920.

The previous prime is 1297561543. The next prime is 1297561627. The reversal of 1297561552 is 2551657921.

It is a junction number, because it is equal to n+sod(n) for n = 1297561499 and 1297561508.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 644227 + ... + 646237.

Almost surely, 2^1297561552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1297561552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1464744048).

1297561552 is an abundant number, since it is smaller than the sum of its proper divisors (1631926544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1297561552 is a wasteful number, since it uses less digits than its factorization.

1297561552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856 (or 2843 counting only the distinct ones).

The product of its digits is 189000, while the sum is 43.

The square root of 1297561552 is about 36021.6816931137. The cubic root of 1297561552 is about 1090.7100701146.

The spelling of 1297561552 in words is "one billion, two hundred ninety-seven million, five hundred sixty-one thousand, five hundred fifty-two".