3515625 has 27 divisors (see below), whose sum is σ = 6347653. Its totient is φ = 1875000.

The previous prime is 3515623. The next prime is 3515639. The reversal of 3515625 is 5265153.

The square root of 3515625 is 1875.

It is a perfect power (a square), and thus also a powerful number.

3515625 is a `hidden beast` number, since 35 + 1 + 5 + 625 = 666.

3515625 is nontrivially palindromic in base 8.

It can be written as a sum of positive squares in 4 ways, for example, as 2499561 + 1016064 = 1581^2 + 1008^2 .

It is not a de Polignac number, because 3515625 - 2¹ = 3515623 is a prime.

It is a Duffinian number.

It is an enlightened number because it begins with the concatenation of its prime factors (35).

It is not an unprimeable number, because it can be changed into a prime (3515623) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 703123 + ... + 703127.

Almost surely, 2^3515625 is an apocalyptic number.

3515625 is the 1875-th square number.

3515625 is the 938-th centered octagonal number.

It is an amenable number.

3515625 is a deficient number, since it is larger than the sum of its proper divisors (2832028).

3515625 is an frugal number, since it uses more digits than its factorization.

3515625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46 (or 8 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The cubic root of 3515625 is about 152.0550498893.

The spelling of 3515625 in words is "three million, five hundred fifteen thousand, six hundred twenty-five".