4021534 has 16 divisors (see below), whose sum is σ = 6706800. Its totient is φ = 1792960.

The previous prime is 4021531. The next prime is 4021543. The reversal of 4021534 is 4351204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559 + ... + 2890.

It is an arithmetic number, because the mean of its divisors is an integer number (419175).

Almost surely, 2^4021534 is an apocalyptic number.

4021534 is a deficient number, since it is larger than the sum of its proper divisors (2685266).

4021534 is a wasteful number, since it uses less digits than its factorization.

4021534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3515.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 4021534 is about 2005.3762739197. The cubic root of 4021534 is about 159.0244546593.

Adding to 4021534 its reverse (4351204), we get a palindrome (8372738).

It can be divided in two parts, 402 and 1534, that added together give a square (1936 = 44²).

The spelling of 4021534 in words is "four million, twenty-one thousand, five hundred thirty-four".