8421867 has 16 divisors (see below), whose sum is σ = 12533760. Its totient is φ = 5589000.

The previous prime is 8421857. The next prime is 8421877. The reversal of 8421867 is 7681248.

It is an interprime number because it is at equal distance from previous prime (8421857) and next prime (8421877).

It is not a de Polignac number, because 8421867 - 2¹⁰ = 8420843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8421827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6742 + ... + 7892.

It is an arithmetic number, because the mean of its divisors is an integer number (783360).

Almost surely, 2^8421867 is an apocalyptic number.

8421867 is a deficient number, since it is larger than the sum of its proper divisors (4111893).

8421867 is a wasteful number, since it uses less digits than its factorization.

8421867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1431 (or 1425 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 8421867 is about 2902.0453132231. The cubic root of 8421867 is about 203.4555116886.

It can be divided in two parts, 8 and 421867, that added together give a cube (421875 = 75³).

The spelling of 8421867 in words is "eight million, four hundred twenty-one thousand, eight hundred sixty-seven".