4021365 has 8 divisors (see below), whose sum is σ = 6434208. Its totient is φ = 2144720.

The previous prime is 4021357. The next prime is 4021379. The reversal of 4021365 is 5631204.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4021365 - 2³ = 4021357 is a prime.

4021365 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134031 + ... + 134060.

It is an arithmetic number, because the mean of its divisors is an integer number (804276).

Almost surely, 2^4021365 is an apocalyptic number.

It is an amenable number.

4021365 is a deficient number, since it is larger than the sum of its proper divisors (2412843).

4021365 is a wasteful number, since it uses less digits than its factorization.

4021365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268099.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 4021365 is about 2005.3341367463. The cubic root of 4021365 is about 159.0222270260.

Adding to 4021365 its reverse (5631204), we get a palindrome (9652569).

The spelling of 4021365 in words is "four million, twenty-one thousand, three hundred sixty-five".