8474021 has 2 divisors, whose sum is σ = 8474022. Its totient is φ = 8474020.

The previous prime is 8473991. The next prime is 8474023. The reversal of 8474021 is 1204748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8473921 + 100 = 2911^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 8474021 - 2¹⁸ = 8211877 is a prime.

It is a super-3 number, since 3×8474021³ (a number of 22 digits) contains 333 as substring.

Together with 8474023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8474023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4237010 + 4237011.

It is an arithmetic number, because the mean of its divisors is an integer number (4237011).

Almost surely, 2^8474021 is an apocalyptic number.

It is an amenable number.

8474021 is a deficient number, since it is larger than the sum of its proper divisors (1).

8474021 is an equidigital number, since it uses as much as digits as its factorization.

8474021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 8474021 is about 2911.0171761774. The cubic root of 8474021 is about 203.8746266040.

Adding to 8474021 its reverse (1204748), we get a palindrome (9678769).

The spelling of 8474021 in words is "eight million, four hundred seventy-four thousand, twenty-one".