1323440145 has 24 divisors (see below), whose sum is σ = 2295349056. Its totient is φ = 705408288.

The previous prime is 1323440137. The next prime is 1323440149. The reversal of 1323440145 is 5410443231.

It is a happy number.

It is not a de Polignac number, because 1323440145 - 2³ = 1323440137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1323440149) 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, 75154 + ... + 91076.

It is an arithmetic number, because the mean of its divisors is an integer number (95639544).

Almost surely, 2^1323440145 is an apocalyptic number.

1323440145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1323440145 is a deficient number, since it is larger than the sum of its proper divisors (971908911).

1323440145 is a wasteful number, since it uses less digits than its factorization.

1323440145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17781 (or 17778 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1323440145 is about 36379.1168804302. The cubic root of 1323440145 is about 1097.9134398802.

Adding to 1323440145 its reverse (5410443231), we get a palindrome (6733883376).

The spelling of 1323440145 in words is "one billion, three hundred twenty-three million, four hundred forty thousand, one hundred forty-five".