42090026 has 16 divisors (see below), whose sum is σ = 70555968. Its totient is φ = 18664800.

The previous prime is 42090017. The next prime is 42090029. The reversal of 42090026 is 62009024.

It is a junction number, because it is equal to n+sod(n) for n = 42089983 and 42090010.

It is not an unprimeable number, because it can be changed into a prime (42090029) 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, 22430 + ... + 24233.

It is an arithmetic number, because the mean of its divisors is an integer number (4409748).

Almost surely, 2^42090026 is an apocalyptic number.

42090026 is a deficient number, since it is larger than the sum of its proper divisors (28465942).

42090026 is a wasteful number, since it uses less digits than its factorization.

42090026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46717.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 42090026 is about 6487.6826371209. The cubic root of 42090026 is about 347.8508465939.

The spelling of 42090026 in words is "forty-two million, ninety thousand, twenty-six".