7213345 has 4 divisors (see below), whose sum is σ = 8656020. Its totient is φ = 5770672.

The previous prime is 7213343. The next prime is 7213351. The reversal of 7213345 is 5433127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4915089 + 2298256 = 2217^2 + 1516^2 .

It is a cyclic number.

It is not a de Polignac number, because 7213345 - 2¹ = 7213343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7213343) 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, 721330 + ... + 721339.

It is an arithmetic number, because the mean of its divisors is an integer number (2164005).

Almost surely, 2^7213345 is an apocalyptic number.

It is an amenable number.

7213345 is a deficient number, since it is larger than the sum of its proper divisors (1442675).

7213345 is a wasteful number, since it uses less digits than its factorization.

7213345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1442674.

The product of its digits is 2520, while the sum is 25.

The square root of 7213345 is about 2685.7671157418. The cubic root of 7213345 is about 193.2171038072.

The spelling of 7213345 in words is "seven million, two hundred thirteen thousand, three hundred forty-five".