8775421 has 4 divisors (see below), whose sum is σ = 8784700. Its totient is φ = 8766144.

The previous prime is 8775419. The next prime is 8775439. The reversal of 8775421 is 1245778.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1245778 = 2 ⋅622889.

It can be written as a sum of positive squares in 2 ways, for example, as 2088025 + 6687396 = 1445^2 + 2586^2 .

It is a cyclic number.

It is not a de Polignac number, because 8775421 - 2¹ = 8775419 is a prime.

It is a super-3 number, since 3×8775421³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

8775421 is a lucky number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8775461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3036 + ... + 5173.

It is an arithmetic number, because the mean of its divisors is an integer number (2196175).

Almost surely, 2^8775421 is an apocalyptic number.

It is an amenable number.

8775421 is a deficient number, since it is larger than the sum of its proper divisors (9279).

8775421 is a wasteful number, since it uses less digits than its factorization.

8775421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9278.

The product of its digits is 15680, while the sum is 34.

The square root of 8775421 is about 2962.3337084130. Note that the first 3 decimals coincide. The cubic root of 8775421 is about 206.2636286066.

The spelling of 8775421 in words is "eight million, seven hundred seventy-five thousand, four hundred twenty-one".