1323261072 has 240 divisors, whose sum is σ = 4389798400. Its totient is φ = 371879424.

The previous prime is 1323261067. The next prime is 1323261089. The reversal of 1323261072 is 2701623231.

1323261072 is a `hidden beast` number, since 13 + 2 + 32 + 610 + 7 + 2 = 666.

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 47 ways as a sum of consecutive naturals, for example, 3605433 + ... + 3605799.

Almost surely, 2^1323261072 is an apocalyptic number.

1323261072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323261072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2194899200).

1323261072 is an abundant number, since it is smaller than the sum of its proper divisors (3066537328).

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

1323261072 is a wasteful number, since it uses less digits than its factorization.

1323261072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 1323261072 is about 36376.6555911892. The cubic root of 1323261072 is about 1097.8639185569.

The spelling of 1323261072 in words is "one billion, three hundred twenty-three million, two hundred sixty-one thousand, seventy-two".