42506386 has 16 divisors (see below), whose sum is σ = 69792408. Its totient is φ = 19296000.

The previous prime is 42506383. The next prime is 42506411. The reversal of 42506386 is 68360524.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13184161 + 29322225 = 3631^2 + 5415^2 .

It is not an unprimeable number, because it can be changed into a prime (42506383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11815 + ... + 14986.

Almost surely, 2^42506386 is an apocalyptic number.

42506386 is a deficient number, since it is larger than the sum of its proper divisors (27286022).

42506386 is a wasteful number, since it uses less digits than its factorization.

42506386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26877.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 42506386 is about 6519.6921706473. The cubic root of 42506386 is about 348.9940804080.

The spelling of 42506386 in words is "forty-two million, five hundred six thousand, three hundred eighty-six".