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7312 = 24457

7312 has 10 divisors (see below), whose sum is σ = 14198. Its totient is φ = 3648.

The previous prime is 7309. The next prime is 7321. The reversal of 7312 is 2137.

It can be written as a sum of positive squares in only one way, i.e., 7056 + 256 = 84^2 + 16^2 .

It is a plaindrome in base 15.

It is a zygodrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 7292 and 7301.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213 + ... + 244.

27312 is an apocalyptic number.

It is an amenable number.

7312 is a deficient number, since it is larger than the sum of its proper divisors (6886).

7312 is a wasteful number, since it uses less digits than its factorization.

7312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465 (or 459 counting only the distinct ones).

The product of its digits is 42, while the sum is 13.

The square root of 7312 is about 85.5102333057. The cubic root of 7312 is about 19.4093977920.

Adding to 7312 its reverse (2137), we get a palindrome (9449).

The spelling of 7312 in words is "seven thousand, three hundred twelve", and thus it is an iban number.

Divisors: 1 2 4 8 16 457 914 1828 3656 7312