4020026 has 8 divisors (see below), whose sum is σ = 6040980. Its totient is φ = 2006368.

The previous prime is 4020017. The next prime is 4020031. The reversal of 4020026 is 6200204.

It is a Cunningham number, because it is equal to 2005²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 4020025 + 1 = 2005^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131 + ... + 2838.

Almost surely, 2^4020026 is an apocalyptic number.

4020026 is a deficient number, since it is larger than the sum of its proper divisors (2020954).

4020026 is a wasteful number, since it uses less digits than its factorization.

4020026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 4020026 is about 2005.0002493765. Note that the first 3 decimals coincide. The cubic root of 4020026 is about 159.0045751093.

The spelling of 4020026 in words is "four million, twenty thousand, twenty-six".