4020826 has 4 divisors (see below), whose sum is σ = 6031242. Its totient is φ = 2010412.

The previous prime is 4020781. The next prime is 4020833. The reversal of 4020826 is 6280204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2886601 + 1134225 = 1699^2 + 1065^2 .

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 4020797 and 4020806.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005205 + ... + 1005208.

Almost surely, 2^4020826 is an apocalyptic number.

4020826 is a deficient number, since it is larger than the sum of its proper divisors (2010416).

4020826 is a wasteful number, since it uses less digits than its factorization.

4020826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010415.

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 4020826 is about 2005.1997406742. The cubic root of 4020826 is about 159.0151219087.

The spelling of 4020826 in words is "four million, twenty thousand, eight hundred twenty-six".