8042221 has 8 divisors (see below), whose sum is σ = 8841888. Its totient is φ = 7254000.

The previous prime is 8042213. The next prime is 8042239. The reversal of 8042221 is 1222408.

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

It is a cyclic number.

It is not a de Polignac number, because 8042221 - 2³ = 8042213 is a prime.

It is a super-2 number, since 2×8042221² = 129354637225682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8042201) by changing a digit.

It is a nontrivial repunit in base 53.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1350 + ... + 4231.

It is an arithmetic number, because the mean of its divisors is an integer number (1105236).

Almost surely, 2^8042221 is an apocalyptic number.

It is an amenable number.

8042221 is a deficient number, since it is larger than the sum of its proper divisors (799667).

8042221 is a wasteful number, since it uses less digits than its factorization.

8042221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 8042221 is about 2835.8809918613. The cubic root of 8042221 is about 200.3512245123.

Adding to 8042221 its reverse (1222408), we get a palindrome (9264629).

It can be divided in two parts, 804 and 2221, that added together give a square (3025 = 55²).

The spelling of 8042221 in words is "eight million, forty-two thousand, two hundred twenty-one".