1323155259 has 24 divisors (see below), whose sum is σ = 1932381360. Its totient is φ = 872368128.

The previous prime is 1323155243. The next prime is 1323155263. The reversal of 1323155259 is 9525513231.

It is not a de Polignac number, because 1323155259 - 2⁴ = 1323155243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323115259) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1086619 + ... + 1087835.

It is an arithmetic number, because the mean of its divisors is an integer number (80515890).

Almost surely, 2^1323155259 is an apocalyptic number.

1323155259 is a deficient number, since it is larger than the sum of its proper divisors (609226101).

1323155259 is a wasteful number, since it uses less digits than its factorization.

1323155259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2459 (or 2456 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 1323155259 is about 36375.2011540830. The cubic root of 1323155259 is about 1097.8346546488.

The spelling of 1323155259 in words is "one billion, three hundred twenty-three million, one hundred fifty-five thousand, two hundred fifty-nine".