806870421 has 12 divisors (see below), whose sum is σ = 1331976672. Its totient is φ = 461068776.

The previous prime is 806870411. The next prime is 806870423. The reversal of 806870421 is 124078608.

It is not a de Polignac number, because 806870421 - 2¹⁸ = 806608277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806870423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6403671 + ... + 6403796.

It is an arithmetic number, because the mean of its divisors is an integer number (110998056).

Almost surely, 2^806870421 is an apocalyptic number.

It is an amenable number.

806870421 is a deficient number, since it is larger than the sum of its proper divisors (525106251).

806870421 is a wasteful number, since it uses less digits than its factorization.

806870421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12807480 (or 12807477 counting only the distinct ones).

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

The square root of 806870421 is about 28405.4646327076. The cubic root of 806870421 is about 930.9676677809.

The spelling of 806870421 in words is "eight hundred six million, eight hundred seventy thousand, four hundred twenty-one".