3515725 has 6 divisors (see below), whose sum is σ = 4359530. Its totient is φ = 2812560.

The previous prime is 3515717. The next prime is 3515731. The reversal of 3515725 is 5275153.

It can be written as a sum of positive squares in 3 ways, for example, as 1247689 + 2268036 = 1117^2 + 1506^2 .

It is not a de Polignac number, because 3515725 - 2³ = 3515717 is a prime.

3515725 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3515693 and 3515702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70290 + ... + 70339.

Almost surely, 2^3515725 is an apocalyptic number.

It is an amenable number.

3515725 is a deficient number, since it is larger than the sum of its proper divisors (843805).

3515725 is a wasteful number, since it uses less digits than its factorization.

3515725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140639 (or 140634 counting only the distinct ones).

The product of its digits is 5250, while the sum is 28.

The square root of 3515725 is about 1875.0266664770. The cubic root of 3515725 is about 152.0564915828.

The spelling of 3515725 in words is "three million, five hundred fifteen thousand, seven hundred twenty-five".