3521285 has 16 divisors (see below), whose sum is σ = 4399920. Its totient is φ = 2703360.

The previous prime is 3521281. The next prime is 3521291. The reversal of 3521285 is 5821253.

It can be written as a sum of positive squares in 8 ways, for example, as 1304164 + 2217121 = 1142^2 + 1489^2 .

It is not a de Polignac number, because 3521285 - 2² = 3521281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18149 + ... + 18341.

It is an arithmetic number, because the mean of its divisors is an integer number (274995).

Almost surely, 2^3521285 is an apocalyptic number.

It is an amenable number.

3521285 is a deficient number, since it is larger than the sum of its proper divisors (878635).

3521285 is a wasteful number, since it uses less digits than its factorization.

3521285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328.

The product of its digits is 2400, while the sum is 26.

The square root of 3521285 is about 1876.5087263320. The cubic root of 3521285 is about 152.1366067614.

Subtracting 3521285 from its reverse (5821253), we obtain a cube (2299968 = 132³).

The spelling of 3521285 in words is "three million, five hundred twenty-one thousand, two hundred eighty-five".