8321457 has 4 divisors (see below), whose sum is σ = 11095280. Its totient is φ = 5547636.

The previous prime is 8321429. The next prime is 8321503. The reversal of 8321457 is 7541238.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8321457 - 2⁶ = 8321393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8321557) 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, 1386907 + ... + 1386912.

It is an arithmetic number, because the mean of its divisors is an integer number (2773820).

Almost surely, 2^8321457 is an apocalyptic number.

It is an amenable number.

8321457 is a deficient number, since it is larger than the sum of its proper divisors (2773823).

8321457 is a wasteful number, since it uses less digits than its factorization.

8321457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773822.

The product of its digits is 6720, while the sum is 30.

The square root of 8321457 is about 2884.6935712481. The cubic root of 8321457 is about 202.6437083850.

It can be divided in two parts, 8321 and 457, that added together give a palindrome (8778).

The spelling of 8321457 in words is "eight million, three hundred twenty-one thousand, four hundred fifty-seven".