126720042 has 32 divisors (see below), whose sum is σ = 261339072. Its totient is φ = 40932864.

The previous prime is 126720031. The next prime is 126720067. The reversal of 126720042 is 240027621.

It is a junction number, because it is equal to n+sod(n) for n = 126719994 and 126720021.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 61818 + ... + 63834.

It is an arithmetic number, because the mean of its divisors is an integer number (8166846).

Almost surely, 2^126720042 is an apocalyptic number.

126720042 is an abundant number, since it is smaller than the sum of its proper divisors (134619030).

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

126720042 is a wasteful number, since it uses less digits than its factorization.

126720042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 126720042 is about 11256.9996890823. Note that the first 3 decimals coincide. The cubic root of 126720042 is about 502.2829497497.

Adding to 126720042 its reverse (240027621), we get a palindrome (366747663).

The spelling of 126720042 in words is "one hundred twenty-six million, seven hundred twenty thousand, forty-two".