126542178 has 24 divisors (see below), whose sum is σ = 313342848. Its totient is φ = 36154872.

The previous prime is 126542177. The next prime is 126542179. The reversal of 126542178 is 871245621.

It is an interprime number because it is at equal distance from previous prime (126542177) and next prime (126542179).

It is not an unprimeable number, because it can be changed into a prime (126542177) 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 in 11 ways as a sum of consecutive naturals, for example, 502026 + ... + 502277.

It is an arithmetic number, because the mean of its divisors is an integer number (13055952).

Almost surely, 2^126542178 is an apocalyptic number.

126542178 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

126542178 is an abundant number, since it is smaller than the sum of its proper divisors (186800670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126542178 is a wasteful number, since it uses less digits than its factorization.

126542178 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004318 (or 1004315 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 126542178 is about 11249.0967637406. The cubic root of 126542178 is about 502.0478385970.

Adding to 126542178 its reverse (871245621), we get a palindrome (997787799).

The spelling of 126542178 in words is "one hundred twenty-six million, five hundred forty-two thousand, one hundred seventy-eight".