3490561 has 4 divisors (see below), whose sum is σ = 3495492. Its totient is φ = 3485632.

The previous prime is 3490517. The next prime is 3490577. The reversal of 3490561 is 1650943.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1650943 = 7 ⋅235849.

It can be written as a sum of positive squares in 2 ways, for example, as 1849600 + 1640961 = 1360^2 + 1281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3490561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3490961) 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, 1180 + ... + 2893.

It is an arithmetic number, because the mean of its divisors is an integer number (873873).

Almost surely, 2^3490561 is an apocalyptic number.

It is an amenable number.

3490561 is a deficient number, since it is larger than the sum of its proper divisors (4931).

3490561 is an equidigital number, since it uses as much as digits as its factorization.

3490561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 3490561 is about 1868.3043114011. The cubic root of 3490561 is about 151.6928382696.

The spelling of 3490561 in words is "three million, four hundred ninety thousand, five hundred sixty-one".