1320415445 has 4 divisors (see below), whose sum is σ = 1584498540. Its totient is φ = 1056332352.

The previous prime is 1320415429. The next prime is 1320415451. The reversal of 1320415445 is 5445140231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 395890609 + 924524836 = 19897^2 + 30406^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320415445 - 2⁴ = 1320415429 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132041540 + ... + 132041549.

It is an arithmetic number, because the mean of its divisors is an integer number (396124635).

Almost surely, 2^1320415445 is an apocalyptic number.

It is an amenable number.

1320415445 is a deficient number, since it is larger than the sum of its proper divisors (264083095).

1320415445 is an equidigital number, since it uses as much as digits as its factorization.

1320415445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264083094.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 1320415445 is about 36337.5211730244. The cubic root of 1320415445 is about 1097.0763810142.

Adding to 1320415445 its reverse (5445140231), we get a palindrome (6765555676).

The spelling of 1320415445 in words is "one billion, three hundred twenty million, four hundred fifteen thousand, four hundred forty-five".