8145321 has 8 divisors (see below), whose sum is σ = 10876224. Its totient is φ = 5422320.

The previous prime is 8145299. The next prime is 8145323. The reversal of 8145321 is 1235418.

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

It is not a de Polignac number, because 8145321 - 2¹¹ = 8143273 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8145291 and 8145300.

It is not an unprimeable number, because it can be changed into a prime (8145323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1131 + ... + 4191.

It is an arithmetic number, because the mean of its divisors is an integer number (1359528).

Almost surely, 2^8145321 is an apocalyptic number.

It is an amenable number.

8145321 is a deficient number, since it is larger than the sum of its proper divisors (2730903).

8145321 is a wasteful number, since it uses less digits than its factorization.

8145321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951.

The product of its digits is 960, while the sum is 24.

The square root of 8145321 is about 2854.0008759634. Note that the first 3 decimals coincide. The cubic root of 8145321 is about 201.2037487428.

Subtracting from 8145321 its reverse (1235418), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8145321 in words is "eight million, one hundred forty-five thousand, three hundred twenty-one".