126073042 has 4 divisors (see below), whose sum is σ = 189109566. Its totient is φ = 63036520.

The previous prime is 126073021. The next prime is 126073043. The reversal of 126073042 is 240370621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240370621 = 31 ⋅7753891.

It can be written as a sum of positive squares in only one way, i.e., 105452361 + 20620681 = 10269^2 + 4541^2 .

It is a junction number, because it is equal to n+sod(n) for n = 126072998 and 126073016.

It is not an unprimeable number, because it can be changed into a prime (126073043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31518259 + ... + 31518262.

Almost surely, 2^126073042 is an apocalyptic number.

126073042 is a deficient number, since it is larger than the sum of its proper divisors (63036524).

126073042 is an equidigital number, since it uses as much as digits as its factorization.

126073042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63036523.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 126073042 is about 11228.2252382111. The cubic root of 126073042 is about 501.4266481452.

The spelling of 126073042 in words is "one hundred twenty-six million, seventy-three thousand, forty-two".