1321465240 has 16 divisors (see below), whose sum is σ = 2973296880. Its totient is φ = 528586080.

The previous prime is 1321465237. The next prime is 1321465289. The reversal of 1321465240 is 425641231.

It is a junction number, because it is equal to n+sod(n) for n = 1321465199 and 1321465208.

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 3 ways as a sum of consecutive naturals, for example, 16518276 + ... + 16518355.

It is an arithmetic number, because the mean of its divisors is an integer number (185831055).

Almost surely, 2^1321465240 is an apocalyptic number.

1321465240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321465240 is an abundant number, since it is smaller than the sum of its proper divisors (1651831640).

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

1321465240 is a wasteful number, since it uses less digits than its factorization.

1321465240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33036642 (or 33036638 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1321465240 is about 36351.9633582562. The cubic root of 1321465240 is about 1097.3670471622.

The spelling of 1321465240 in words is "one billion, three hundred twenty-one million, four hundred sixty-five thousand, two hundred forty".