1605120025 has 24 divisors (see below), whose sum is σ = 2134149120. Its totient is φ = 1193237760.

The previous prime is 1605120017. The next prime is 1605120037. The reversal of 1605120025 is 5200215061.

It is not a de Polignac number, because 1605120025 - 2³ = 1605120017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1605119978 and 1605120005.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9672 + ... + 57478.

It is an arithmetic number, because the mean of its divisors is an integer number (88922880).

Almost surely, 2^1605120025 is an apocalyptic number.

It is an amenable number.

1605120025 is a deficient number, since it is larger than the sum of its proper divisors (529029095).

1605120025 is a wasteful number, since it uses less digits than its factorization.

1605120025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47913 (or 47908 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1605120025 is about 40063.9491937577. The cubic root of 1605120025 is about 1170.8533538733.

Adding to 1605120025 its reverse (5200215061), we get a palindrome (6805335086).

The spelling of 1605120025 in words is "one billion, six hundred five million, one hundred twenty thousand, twenty-five".