815473421 has 8 divisors (see below), whose sum is σ = 932166144. Its totient is φ = 698829840.

The previous prime is 815473403. The next prime is 815473499. The reversal of 815473421 is 124374518.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 815473421 - 2²⁶ = 748364557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815473621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35876 + ... + 54018.

It is an arithmetic number, because the mean of its divisors is an integer number (116520768).

Almost surely, 2^815473421 is an apocalyptic number.

It is an amenable number.

815473421 is a deficient number, since it is larger than the sum of its proper divisors (116692723).

815473421 is a wasteful number, since it uses less digits than its factorization.

815473421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24571.

The product of its digits is 26880, while the sum is 35.

The square root of 815473421 is about 28556.4952506431. The cubic root of 815473421 is about 934.2646934149.

The spelling of 815473421 in words is "eight hundred fifteen million, four hundred seventy-three thousand, four hundred twenty-one".