126549 has 16 divisors (see below), whose sum is σ = 193600. Its totient is φ = 81648.

The previous prime is 126547. The next prime is 126551. The reversal of 126549 is 945621.

126549 is a `hidden beast` number, since 1 + 2 + 654 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (126547) and next prime (126551).

It is not a de Polignac number, because 126549 - 2¹ = 126547 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

126549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1107 + ... + 1215.

It is an arithmetic number, because the mean of its divisors is an integer number (12100).

2¹²⁶⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

126549 is a deficient number, since it is larger than the sum of its proper divisors (67051).

126549 is a wasteful number, since it uses less digits than its factorization.

126549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 155 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 126549 is about 355.7372625970. The cubic root of 126549 is about 50.2056860382.

It can be divided in two parts, 12 and 6549, that added together give a 8-th power (6561 = 3⁸).

The spelling of 126549 in words is "one hundred twenty-six thousand, five hundred forty-nine".