4156549 has 2 divisors, whose sum is σ = 4156550. Its totient is φ = 4156548.

The previous prime is 4156531. The next prime is 4156561. The reversal of 4156549 is 9456514.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3724900 + 431649 = 1930^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 4156549 - 2⁹ = 4156037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4156519) 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, 2078274 + 2078275.

It is an arithmetic number, because the mean of its divisors is an integer number (2078275).

Almost surely, 2^4156549 is an apocalyptic number.

It is an amenable number.

4156549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4156549 is an equidigital number, since it uses as much as digits as its factorization.

4156549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 34.

The square root of 4156549 is about 2038.7616339337. The cubic root of 4156549 is about 160.7845452049.

It can be divided in two parts, 41565 and 49, that added together give a palindrome (41614).

The spelling of 4156549 in words is "four million, one hundred fifty-six thousand, five hundred forty-nine".