4020311 has 4 divisors (see below), whose sum is σ = 4057992. Its totient is φ = 3982632.

The previous prime is 4020307. The next prime is 4020323. The reversal of 4020311 is 1130204.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 4020311 - 2² = 4020307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4020292 and 4020301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4020361) 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 3 ways as a sum of consecutive naturals, for example, 18680 + ... + 18893.

It is an arithmetic number, because the mean of its divisors is an integer number (1014498).

Almost surely, 2^4020311 is an apocalyptic number.

4020311 is a deficient number, since it is larger than the sum of its proper divisors (37681).

4020311 is a wasteful number, since it uses less digits than its factorization.

4020311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37680.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 4020311 is about 2005.0713204273. The cubic root of 4020311 is about 159.0083325670.

Adding to 4020311 its reverse (1130204), we get a palindrome (5150515).

The spelling of 4020311 in words is "four million, twenty thousand, three hundred eleven".