3521858 has 6 divisors (see below), whose sum is σ = 5286771. Its totient is φ = 1759602.

The previous prime is 3521857. The next prime is 3521867. The reversal of 3521858 is 8581253.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1760929 + 1760929 = 1327^2 + 1327^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=1327.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3521857) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1991 + ... + 3317.

Almost surely, 2^3521858 is an apocalyptic number.

3521858 is a deficient number, since it is larger than the sum of its proper divisors (1764913).

3521858 is an frugal number, since it uses more digits than its factorization.

3521858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656 (or 1329 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 3521858 is about 1876.6613972691. The cubic root of 3521858 is about 152.1448584411.

Multiplying 3521858 by its sum of digits (32), we get a square (112699456 = 10616²).

The spelling of 3521858 in words is "three million, five hundred twenty-one thousand, eight hundred fifty-eight".