7130545 has 4 divisors (see below), whose sum is σ = 8556660. Its totient is φ = 5704432.

The previous prime is 7130537. The next prime is 7130551. The reversal of 7130545 is 5450317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5450317 = 367 ⋅14851.

It can be written as a sum of positive squares in 2 ways, for example, as 2286144 + 4844401 = 1512^2 + 2201^2 .

It is a cyclic number.

It is not a de Polignac number, because 7130545 - 2³ = 7130537 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 713050 + ... + 713059.

It is an arithmetic number, because the mean of its divisors is an integer number (2139165).

Almost surely, 2^7130545 is an apocalyptic number.

It is an amenable number.

7130545 is a deficient number, since it is larger than the sum of its proper divisors (1426115).

7130545 is a wasteful number, since it uses less digits than its factorization.

7130545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1426114.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 7130545 is about 2670.3080346657. The cubic root of 7130545 is about 192.4749616054.

The spelling of 7130545 in words is "seven million, one hundred thirty thousand, five hundred forty-five".