1325507999 has 4 divisors (see below), whose sum is σ = 1332236664. Its totient is φ = 1318779336.

The previous prime is 1325507993. The next prime is 1325508011. The reversal of 1325507999 is 9997055231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9997055231 = 6491 ⋅1540141.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1325507999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1325507993) 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, 3364037 + ... + 3364430.

It is an arithmetic number, because the mean of its divisors is an integer number (333059166).

Almost surely, 2^1325507999 is an apocalyptic number.

1325507999 is a deficient number, since it is larger than the sum of its proper divisors (6728665).

1325507999 is an equidigital number, since it uses as much as digits as its factorization.

1325507999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6728664.

The product of its (nonzero) digits is 765450, while the sum is 50.

The square root of 1325507999 is about 36407.5266806192. The cubic root of 1325507999 is about 1098.4849663633.

The spelling of 1325507999 in words is "one billion, three hundred twenty-five million, five hundred seven thousand, nine hundred ninety-nine".