7145539 has 4 divisors (see below), whose sum is σ = 7521640. Its totient is φ = 6769440.

The previous prime is 7145533. The next prime is 7145557. The reversal of 7145539 is 9355417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9355417 = 79 ⋅118423.

It is a cyclic number.

It is not a de Polignac number, because 7145539 - 2⁵ = 7145507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7145533) 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, 188022 + ... + 188059.

It is an arithmetic number, because the mean of its divisors is an integer number (1880410).

Almost surely, 2^7145539 is an apocalyptic number.

7145539 is a deficient number, since it is larger than the sum of its proper divisors (376101).

7145539 is a wasteful number, since it uses less digits than its factorization.

7145539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376100.

The product of its digits is 18900, while the sum is 34.

The square root of 7145539 is about 2673.1141015677. The cubic root of 7145539 is about 192.6097782791.

The spelling of 7145539 in words is "seven million, one hundred forty-five thousand, five hundred thirty-nine".