3520861 has 8 divisors (see below), whose sum is σ = 3669120. Its totient is φ = 3374448.

The previous prime is 3520841. The next prime is 3520873. The reversal of 3520861 is 1680253.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3520861 - 2⁷ = 3520733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3520801) 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, 4480 + ... + 5206.

It is an arithmetic number, because the mean of its divisors is an integer number (458640).

Almost surely, 2^3520861 is an apocalyptic number.

It is an amenable number.

3520861 is a deficient number, since it is larger than the sum of its proper divisors (148259).

3520861 is a wasteful number, since it uses less digits than its factorization.

3520861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

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

The square root of 3520861 is about 1876.3957471706. The cubic root of 3520861 is about 152.1305002302.

The spelling of 3520861 in words is "three million, five hundred twenty thousand, eight hundred sixty-one".