7505643 has 4 divisors (see below), whose sum is σ = 10007528. Its totient is φ = 5003760.

The previous prime is 7505639. The next prime is 7505647. The reversal of 7505643 is 3465057.

7505643 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3465057 = 3 ⋅1155019.

It is an interprime number because it is at equal distance from previous prime (7505639) and next prime (7505647).

It is not a de Polignac number, because 7505643 - 2² = 7505639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7505643.

It is not an unprimeable number, because it can be changed into a prime (7505647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250938 + ... + 1250943.

It is an arithmetic number, because the mean of its divisors is an integer number (2501882).

Almost surely, 2^7505643 is an apocalyptic number.

7505643 is a deficient number, since it is larger than the sum of its proper divisors (2501885).

7505643 is a wasteful number, since it uses less digits than its factorization.

7505643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501884.

The product of its (nonzero) digits is 12600, while the sum is 30.

The square root of 7505643 is about 2739.6428599363. The cubic root of 7505643 is about 195.7924621914.

The spelling of 7505643 in words is "seven million, five hundred five thousand, six hundred forty-three".