1320735225 has 12 divisors (see below), whose sum is σ = 2183615696. Its totient is φ = 704392080.

The previous prime is 1320735223. The next prime is 1320735257. The reversal of 1320735225 is 5225370231.

It is a happy number.

It is not a de Polignac number, because 1320735225 - 2¹ = 1320735223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1320735192 and 1320735201.

It is not an unprimeable number, because it can be changed into a prime (1320735223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8804827 + ... + 8804976.

Almost surely, 2^1320735225 is an apocalyptic number.

1320735225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1320735225 is a deficient number, since it is larger than the sum of its proper divisors (862880471).

1320735225 is a wasteful number, since it uses less digits than its factorization.

1320735225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17609816 (or 17609811 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 1320735225 is about 36341.9210416841. The cubic root of 1320735225 is about 1097.1649376800.

The spelling of 1320735225 in words is "one billion, three hundred twenty million, seven hundred thirty-five thousand, two hundred twenty-five".