3521385 has 36 divisors (see below), whose sum is σ = 7104708. Its totient is φ = 1608768.

The previous prime is 3521377. The next prime is 3521389. The reversal of 3521385 is 5831253.

It can be written as a sum of positive squares in 2 ways, for example, as 974169 + 2547216 = 987^2 + 1596^2 .

It is not a de Polignac number, because 3521385 - 2³ = 3521377 is a prime.

It is a super-3 number, since 3×3521385³ (a number of 21 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (3521389) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1407 + ... + 3003.

It is an arithmetic number, because the mean of its divisors is an integer number (197353).

Almost surely, 2^3521385 is an apocalyptic number.

3521385 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3521385 is an abundant number, since it is smaller than the sum of its proper divisors (3583323).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3521385 is a wasteful number, since it uses less digits than its factorization.

3521385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622 (or 1612 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 3521385 is about 1876.5353713693. The cubic root of 3521385 is about 152.1380469096.

The spelling of 3521385 in words is "three million, five hundred twenty-one thousand, three hundred eighty-five".