7145189 has 2 divisors, whose sum is σ = 7145190. Its totient is φ = 7145188.

The previous prime is 7145183. The next prime is 7145191. The reversal of 7145189 is 9815417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3869089 + 3276100 = 1967^2 + 1810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7145189 is a prime.

It is a Sophie Germain prime.

Together with 7145191, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7145183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3572594 + 3572595.

It is an arithmetic number, because the mean of its divisors is an integer number (3572595).

Almost surely, 2^7145189 is an apocalyptic number.

It is an amenable number.

7145189 is a deficient number, since it is larger than the sum of its proper divisors (1).

7145189 is an equidigital number, since it uses as much as digits as its factorization.

7145189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 35.

The square root of 7145189 is about 2673.0486340506. The cubic root of 7145189 is about 192.6066334488.

The spelling of 7145189 in words is "seven million, one hundred forty-five thousand, one hundred eighty-nine".