1326405361 has 4 divisors (see below), whose sum is σ = 1326670192. Its totient is φ = 1326140532.

The previous prime is 1326405347. The next prime is 1326405397. The reversal of 1326405361 is 1635046231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1326405361 - 2⁵ = 1326405329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1326405461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124755 + ... + 134968.

It is an arithmetic number, because the mean of its divisors is an integer number (331667548).

Almost surely, 2^1326405361 is an apocalyptic number.

It is an amenable number.

1326405361 is a deficient number, since it is larger than the sum of its proper divisors (264831).

1326405361 is an equidigital number, since it uses as much as digits as its factorization.

1326405361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264830.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 1326405361 is about 36419.8484483393. The cubic root of 1326405361 is about 1098.7327999748.

The spelling of 1326405361 in words is "one billion, three hundred twenty-six million, four hundred five thousand, three hundred sixty-one".