1603265625 has 84 divisors (see below), whose sum is σ = 3120975676. Its totient is φ = 788400000.

The previous prime is 1603265569. The next prime is 1603265627. The reversal of 1603265625 is 5265623061.

It is a happy number.

1603265625 is a `hidden beast` number, since 1 + 6 + 0 + 3 + 26 + 5 + 625 = 666.

It can be written as a sum of positive squares in 14 ways, for example, as 1321831449 + 281434176 = 36357^2 + 16776^2 .

It is not a de Polignac number, because 1603265625 - 2⁶ = 1603265561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1603265625.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1603265627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 1827687 + ... + 1828563.

Almost surely, 2^1603265625 is an apocalyptic number.

1603265625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1603265625 is a deficient number, since it is larger than the sum of its proper divisors (1517710051).

1603265625 is an frugal number, since it uses more digits than its factorization.

1603265625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1603265625 is about 40040.7995050049. The cubic root of 1603265625 is about 1170.4022833187.

Adding to 1603265625 its reverse (5265623061), we get a palindrome (6868888686).

The spelling of 1603265625 in words is "one billion, six hundred three million, two hundred sixty-five thousand, six hundred twenty-five".