5106821 has 2 divisors, whose sum is σ = 5106822. Its totient is φ = 5106820.

The previous prime is 5106793. The next prime is 5106823. The reversal of 5106821 is 1286015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4056196 + 1050625 = 2014^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 5106821 - 2⁶ = 5106757 is a prime.

Together with 5106823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5106823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2553410 + 2553411.

It is an arithmetic number, because the mean of its divisors is an integer number (2553411).

Almost surely, 2^5106821 is an apocalyptic number.

It is an amenable number.

5106821 is a deficient number, since it is larger than the sum of its proper divisors (1).

5106821 is an equidigital number, since it uses as much as digits as its factorization.

5106821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 5106821 is about 2259.8276482953. The cubic root of 5106821 is about 172.2067663935.

The spelling of 5106821 in words is "five million, one hundred six thousand, eight hundred twenty-one".