2516561 has 8 divisors (see below), whose sum is σ = 2682720. Its totient is φ = 2352448.

The previous prime is 2516543. The next prime is 2516567. The reversal of 2516561 is 1656152.

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 2516561 - 2⁶ = 2516497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2516561.

It is not an unprimeable number, because it can be changed into a prime (2516567) 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, 2630 + ... + 3456.

It is an arithmetic number, because the mean of its divisors is an integer number (335340).

2^2516561 is an apocalyptic number.

It is an amenable number.

2516561 is a deficient number, since it is larger than the sum of its proper divisors (166159).

2516561 is a wasteful number, since it uses less digits than its factorization.

2516561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023.

The product of its digits is 1800, while the sum is 26.

The square root of 2516561 is about 1586.3672336505. The cubic root of 2516561 is about 136.0199113004.

The spelling of 2516561 in words is "two million, five hundred sixteen thousand, five hundred sixty-one".