4020531 has 16 divisors (see below), whose sum is σ = 5700000. Its totient is φ = 2515968.

The previous prime is 4020529. The next prime is 4020563. The reversal of 4020531 is 1350204.

It is not a de Polignac number, because 4020531 - 2¹ = 4020529 is a prime.

It is a super-2 number, since 2×4020531² = 32329339043922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4020531.

It is not an unprimeable number, because it can be changed into a prime (4020031) 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 15 ways as a sum of consecutive naturals, for example, 2595 + ... + 3843.

It is an arithmetic number, because the mean of its divisors is an integer number (356250).

Almost surely, 2^4020531 is an apocalyptic number.

4020531 is a deficient number, since it is larger than the sum of its proper divisors (1679469).

4020531 is a wasteful number, since it uses less digits than its factorization.

4020531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 4020531 is about 2005.1261805682. The cubic root of 4020531 is about 159.0112329392.

Adding to 4020531 its reverse (1350204), we get a palindrome (5370735).

The spelling of 4020531 in words is "four million, twenty thousand, five hundred thirty-one".