1323605745 has 64 divisors (see below), whose sum is σ = 2933729280. Its totient is φ = 550065600.

The previous prime is 1323605711. The next prime is 1323605749. The reversal of 1323605745 is 5475063231.

1323605745 is a `hidden beast` number, since 1 + 3 + 2 + 3 + 605 + 7 + 45 = 666.

It is not a de Polignac number, because 1323605745 - 2¹⁷ = 1323474673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323605749) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 53271 + ... + 74060.

It is an arithmetic number, because the mean of its divisors is an integer number (45839520).

Almost surely, 2^1323605745 is an apocalyptic number.

1323605745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1323605745 is an abundant number, since it is smaller than the sum of its proper divisors (1610123535).

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

1323605745 is a wasteful number, since it uses less digits than its factorization.

1323605745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127363 (or 127357 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 36.

The square root of 1323605745 is about 36381.3928402968. The cubic root of 1323605745 is about 1097.9592313687.

Adding to 1323605745 its reverse (5475063231), we get a palindrome (6798668976).

The spelling of 1323605745 in words is "one billion, three hundred twenty-three million, six hundred five thousand, seven hundred forty-five".