1320355025 has 18 divisors (see below), whose sum is σ = 1799615286. Its totient is φ = 960256000.

The previous prime is 1320355013. The next prime is 1320355037. The reversal of 1320355025 is 5205530231.

It is an interprime number because it is at equal distance from previous prime (1320355013) and next prime (1320355037).

It can be written as a sum of positive squares in 3 ways, for example, as 199176769 + 1121178256 = 14113^2 + 33484^2 .

It is not a de Polignac number, because 1320355025 - 2⁴ = 1320355009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320354985 and 1320355003.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 215216 + ... + 221265.

It is an arithmetic number, because the mean of its divisors is an integer number (99978627).

Almost surely, 2^1320355025 is an apocalyptic number.

It is an amenable number.

1320355025 is a deficient number, since it is larger than the sum of its proper divisors (479260261).

1320355025 is a wasteful number, since it uses less digits than its factorization.

1320355025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436513 (or 436497 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 1320355025 is about 36336.6897914491. The cubic root of 1320355025 is about 1097.0596472995.

Adding to 1320355025 its reverse (5205530231), we get a palindrome (6525885256).

The spelling of 1320355025 in words is "one billion, three hundred twenty million, three hundred fifty-five thousand, twenty-five".