2516861 has 4 divisors (see below), whose sum is σ = 2548800. Its totient is φ = 2484924.

The previous prime is 2516837. The next prime is 2516863. The reversal of 2516861 is 1686152.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2516861 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2516863) 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, 15851 + ... + 16008.

It is an arithmetic number, because the mean of its divisors is an integer number (637200).

2^2516861 is an apocalyptic number.

It is an amenable number.

2516861 is a deficient number, since it is larger than the sum of its proper divisors (31939).

2516861 is an equidigital number, since it uses as much as digits as its factorization.

2516861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31938.

The product of its digits is 2880, while the sum is 29.

The square root of 2516861 is about 1586.4617864922. The cubic root of 2516861 is about 136.0253160773.

The spelling of 2516861 in words is "two million, five hundred sixteen thousand, eight hundred sixty-one".