3500725 has 12 divisors (see below), whose sum is σ = 4596804. Its totient is φ = 2635520.

The previous prime is 3500711. The next prime is 3500747. The reversal of 3500725 is 5270053.

It can be written as a sum of positive squares in 6 ways, for example, as 18769 + 3481956 = 137^2 + 1866^2 .

It is not a de Polignac number, because 3500725 - 2¹⁹ = 2976437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3500696 and 3500705.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3694 + ... + 4543.

It is an arithmetic number, because the mean of its divisors is an integer number (383067).

Almost surely, 2^3500725 is an apocalyptic number.

It is an amenable number.

3500725 is a deficient number, since it is larger than the sum of its proper divisors (1096079).

3500725 is a wasteful number, since it uses less digits than its factorization.

3500725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8264 (or 8259 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 22.

The square root of 3500725 is about 1871.0224477542. The cubic root of 3500725 is about 151.8399313319.

Adding to 3500725 its reverse (5270053), we get a palindrome (8770778).

It can be divided in two parts, 3500 and 725, that added together give a square (4225 = 65²).

The spelling of 3500725 in words is "three million, five hundred thousand, seven hundred twenty-five".