42215986 has 16 divisors (see below), whose sum is σ = 68808960. Its totient is φ = 19351440.

The previous prime is 42215977. The next prime is 42215989. The reversal of 42215986 is 68951224.

It is not an unprimeable number, because it can be changed into a prime (42215989) 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, 16741 + ... + 19096.

It is an arithmetic number, because the mean of its divisors is an integer number (4300560).

Almost surely, 2^42215986 is an apocalyptic number.

42215986 is a deficient number, since it is larger than the sum of its proper divisors (26592974).

42215986 is a wasteful number, since it uses less digits than its factorization.

42215986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35889.

The product of its digits is 34560, while the sum is 37.

The square root of 42215986 is about 6497.3830116440. The cubic root of 42215986 is about 348.1974976624.

The spelling of 42215986 in words is "forty-two million, two hundred fifteen thousand, nine hundred eighty-six".