1385855325 has 30 divisors (see below), whose sum is σ = 2567086874. Its totient is φ = 739121760.

The previous prime is 1385855323. The next prime is 1385855327. The reversal of 1385855325 is 5235585831.

1385855325 is a `hidden beast` number, since 1 + 38 + 5 + 85 + 532 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1385855323) and next prime (1385855327).

It can be written as a sum of positive squares in 3 ways, for example, as 232166169 + 1153689156 = 15237^2 + 33966^2 .

It is not a de Polignac number, because 1385855325 - 2¹ = 1385855323 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1385855323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 340162 + ... + 344211.

Almost surely, 2^1385855325 is an apocalyptic number.

1385855325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1385855325 is a deficient number, since it is larger than the sum of its proper divisors (1181231549).

1385855325 is an equidigital number, since it uses as much as digits as its factorization.

1385855325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684395 (or 684381 counting only the distinct ones).

The product of its digits is 720000, while the sum is 45.

The square root of 1385855325 is about 37227.0778466428. The cubic root of 1385855325 is about 1114.9086842978.

The spelling of 1385855325 in words is "one billion, three hundred eighty-five million, eight hundred fifty-five thousand, three hundred twenty-five".