3502561 has 4 divisors (see below), whose sum is σ = 3708612. Its totient is φ = 3296512.

The previous prime is 3502553. The next prime is 3502567. The reversal of 3502561 is 1652053.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1652053 = 13 ⋅127081.

It can be written as a sum of positive squares in 2 ways, for example, as 2954961 + 547600 = 1719^2 + 740^2 .

It is a cyclic number.

It is not a de Polignac number, because 3502561 - 2³ = 3502553 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3502567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103000 + ... + 103033.

It is an arithmetic number, because the mean of its divisors is an integer number (927153).

Almost surely, 2^3502561 is an apocalyptic number.

It is an amenable number.

3502561 is a deficient number, since it is larger than the sum of its proper divisors (206051).

3502561 is a wasteful number, since it uses less digits than its factorization.

3502561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206050.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 3502561 is about 1871.5130242667. The cubic root of 3502561 is about 151.8664714907.

The spelling of 3502561 in words is "three million, five hundred two thousand, five hundred sixty-one".