4021011 has 12 divisors (see below), whose sum is σ = 5836480. Its totient is φ = 2667600.

The previous prime is 4021009. The next prime is 4021013. The reversal of 4021011 is 1101204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4021009) and next prime (4021013).

It is not a de Polignac number, because 4021011 - 2¹ = 4021009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4020984 and 4021002.

It is not an unprimeable number, because it can be changed into a prime (4021013) by changing a digit.

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 in 11 ways as a sum of consecutive naturals, for example, 1086 + ... + 3036.

Almost surely, 2^4021011 is an apocalyptic number.

4021011 is a deficient number, since it is larger than the sum of its proper divisors (1815469).

4021011 is a wasteful number, since it uses less digits than its factorization.

4021011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186 (or 2183 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 4021011 is about 2005.2458702114. The cubic root of 4021011 is about 159.0175606569.

Adding to 4021011 its reverse (1101204), we get a palindrome (5122215).

The spelling of 4021011 in words is "four million, twenty-one thousand, eleven".