3521860 has 24 divisors (see below), whose sum is σ = 7433496. Its totient is φ = 1401600.

The previous prime is 3521857. The next prime is 3521867. The reversal of 3521860 is 681253.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1758276 + 1763584 = 1326^2 + 1328^2 .

It is not an unprimeable number, because it can be changed into a prime (3521867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5560 + ... + 6160.

It is an arithmetic number, because the mean of its divisors is an integer number (309729).

Almost surely, 2^3521860 is an apocalyptic number.

It is an amenable number.

3521860 is an abundant number, since it is smaller than the sum of its proper divisors (3911636).

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

3521860 is a wasteful number, since it uses less digits than its factorization.

3521860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 3521860 is about 1876.6619301302. The cubic root of 3521860 is about 152.1448872412.

The spelling of 3521860 in words is "three million, five hundred twenty-one thousand, eight hundred sixty".