867215421 has 24 divisors (see below), whose sum is σ = 1295533824. Its totient is φ = 558420480.

The previous prime is 867215387. The next prime is 867215429. The reversal of 867215421 is 124512768.

867215421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 867215421 - 2¹⁷ = 867084349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867215429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158290 + ... + 163676.

It is an arithmetic number, because the mean of its divisors is an integer number (53980576).

Almost surely, 2^867215421 is an apocalyptic number.

It is an amenable number.

867215421 is a deficient number, since it is larger than the sum of its proper divisors (428318403).

867215421 is a wasteful number, since it uses less digits than its factorization.

867215421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6001 (or 5998 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 867215421 is about 29448.5215418364. The cubic root of 867215421 is about 953.6206876472.

The spelling of 867215421 in words is "eight hundred sixty-seven million, two hundred fifteen thousand, four hundred twenty-one".