5065821 has 14 divisors (see below), whose sum is σ = 7596350. Its totient is φ = 3376728.

The previous prime is 5065817. The next prime is 5065831. The reversal of 5065821 is 1285605.

5065821 is a `hidden beast` number, since 5 + 0 + 658 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4901796 + 164025 = 2214^2 + 405^2 .

It is not a de Polignac number, because 5065821 - 2² = 5065817 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5065831) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2746 + ... + 4203.

Almost surely, 2^5065821 is an apocalyptic number.

It is an amenable number.

5065821 is a deficient number, since it is larger than the sum of its proper divisors (2530529).

5065821 is an frugal number, since it uses more digits than its factorization.

5065821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6967 (or 6952 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 5065821 is about 2250.7378790077. The cubic root of 5065821 is about 171.7446748030.

It can be divided in two parts, 5065 and 821, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 5065821 in words is "five million, sixty-five thousand, eight hundred twenty-one".