1325154409 has 4 divisors (see below), whose sum is σ = 1325237380. Its totient is φ = 1325071440.

The previous prime is 1325154379. The next prime is 1325154419. The reversal of 1325154409 is 9044515231.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9044515231 = 131 ⋅69042101.

It can be written as a sum of positive squares in 2 ways, for example, as 269879184 + 1055275225 = 16428^2 + 32485^2 .

It is a cyclic number.

It is not a de Polignac number, because 1325154409 - 2⁵ = 1325154377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1325154419) 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, 9102 + ... + 52279.

It is an arithmetic number, because the mean of its divisors is an integer number (331309345).

Almost surely, 2^1325154409 is an apocalyptic number.

It is an amenable number.

1325154409 is a deficient number, since it is larger than the sum of its proper divisors (82971).

1325154409 is an equidigital number, since it uses as much as digits as its factorization.

1325154409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82970.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 1325154409 is about 36402.6703553462. The cubic root of 1325154409 is about 1098.3872810879.

The spelling of 1325154409 in words is "one billion, three hundred twenty-five million, one hundred fifty-four thousand, four hundred nine".