2158547 has 2 divisors, whose sum is σ = 2158548. Its totient is φ = 2158546.

The previous prime is 2158523. The next prime is 2158549. The reversal of 2158547 is 7458512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2158547 - 2⁶ = 2158483 is a prime.

Together with 2158549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2158549) 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 as a sum of consecutive naturals, namely, 1079273 + 1079274.

It is an arithmetic number, because the mean of its divisors is an integer number (1079274).

2^2158547 is an apocalyptic number.

2158547 is a deficient number, since it is larger than the sum of its proper divisors (1).

2158547 is an equidigital number, since it uses as much as digits as its factorization.

2158547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 32.

The square root of 2158547 is about 1469.1994418730. The cubic root of 2158547 is about 129.2370897742.

The spelling of 2158547 in words is "two million, one hundred fifty-eight thousand, five hundred forty-seven".