4021040 has 20 divisors (see below), whose sum is σ = 9349104. Its totient is φ = 1608384.

The previous prime is 4021033. The next prime is 4021051. The reversal of 4021040 is 401204.

4021040 is nontrivially palindromic in base 15.

It is a tau number, because it is divible by the number of its divisors (20).

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, 25052 + ... + 25211.

Almost surely, 2^4021040 is an apocalyptic number.

4021040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4021040 is an abundant number, since it is smaller than the sum of its proper divisors (5328064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4021040 is a wasteful number, since it uses less digits than its factorization.

4021040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50276 (or 50270 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

The square root of 4021040 is about 2005.2531012319. The cubic root of 4021040 is about 159.0179429403.

Adding to 4021040 its reverse (401204), we get a palindrome (4422244).

The spelling of 4021040 in words is "four million, twenty-one thousand, forty".