3705521225 has 12 divisors (see below), whose sum is σ = 5251253184. Its totient is φ = 2540928720.

The previous prime is 3705521213. The next prime is 3705521249. The reversal of 3705521225 is 5221255073.

It is not a de Polignac number, because 3705521225 - 2⁸ = 3705520969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3705521191 and 3705521200.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 10587029 + ... + 10587378.

It is an arithmetic number, because the mean of its divisors is an integer number (437604432).

Almost surely, 2^3705521225 is an apocalyptic number.

3705521225 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3705521225 is a deficient number, since it is larger than the sum of its proper divisors (1545731959).

3705521225 is a wasteful number, since it uses less digits than its factorization.

3705521225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21174424 (or 21174419 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 3705521225 is about 60872.9925747043. The cubic root of 3705521225 is about 1547.4493220799.

Adding to 3705521225 its reverse (5221255073), we get a palindrome (8926776298).

The spelling of 3705521225 in words is "three billion, seven hundred five million, five hundred twenty-one thousand, two hundred twenty-five".