126542 has 16 divisors (see below), whose sum is σ = 212352. Its totient is φ = 56160.

The previous prime is 126541. The next prime is 126547. The reversal of 126542 is 245621.

It is a happy 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 7 ways as a sum of consecutive naturals, for example, 728 + ... + 884.

It is an arithmetic number, because the mean of its divisors is an integer number (13272).

2¹²⁶⁵⁴² is an apocalyptic number.

126542 is a deficient number, since it is larger than the sum of its proper divisors (85810).

126542 is a wasteful number, since it uses less digits than its factorization.

126542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203.

The product of its digits is 480, while the sum is 20.

The square root of 126542 is about 355.7274237390. The cubic root of 126542 is about 50.2047603196.

The spelling of 126542 in words is "one hundred twenty-six thousand, five hundred forty-two".