7312513 has 4 divisors (see below), whose sum is σ = 7875028. Its totient is φ = 6750000.

The previous prime is 7312493. The next prime is 7312517. The reversal of 7312513 is 3152137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3152137 = 419 ⋅7523.

It can be written as a sum of positive squares in 2 ways, for example, as 5053504 + 2259009 = 2248^2 + 1503^2 .

It is a cyclic number.

It is not a de Polignac number, because 7312513 - 2²¹ = 5215361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7312517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281238 + ... + 281263.

It is an arithmetic number, because the mean of its divisors is an integer number (1968757).

Almost surely, 2^7312513 is an apocalyptic number.

It is an amenable number.

7312513 is a deficient number, since it is larger than the sum of its proper divisors (562515).

7312513 is a wasteful number, since it uses less digits than its factorization.

7312513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562514.

The product of its digits is 630, while the sum is 22.

The square root of 7312513 is about 2704.1658602978. The cubic root of 7312513 is about 194.0985169376.

It can be divided in two parts, 73125 and 13, that multiplied together give a square (950625 = 975²).

The spelling of 7312513 in words is "seven million, three hundred twelve thousand, five hundred thirteen".