5126821 has 8 divisors (see below), whose sum is σ = 5979200. Its totient is φ = 4394124.

The previous prime is 5126819. The next prime is 5126833. The reversal of 5126821 is 1286215.

It is not a de Polignac number, because 5126821 - 2¹ = 5126819 is a prime.

It is a Duffinian number.

5126821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5126851) 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, 7131 + ... + 7816.

It is an arithmetic number, because the mean of its divisors is an integer number (747400).

Almost surely, 2^5126821 is an apocalyptic number.

It is an amenable number.

5126821 is a deficient number, since it is larger than the sum of its proper divisors (852379).

5126821 is an equidigital number, since it uses as much as digits as its factorization.

5126821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14968 (or 14954 counting only the distinct ones).

The product of its digits is 960, while the sum is 25.

The square root of 5126821 is about 2264.2484404323. The cubic root of 5126821 is about 172.4312797754.

Subtracting from 5126821 its reverse (1286215), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 5126821 in words is "five million, one hundred twenty-six thousand, eight hundred twenty-one".