42306986 has 4 divisors (see below), whose sum is σ = 63460482. Its totient is φ = 21153492.

The previous prime is 42306967. The next prime is 42306989. The reversal of 42306986 is 68960324.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 33120025 + 9186961 = 5755^2 + 3031^2 .

It is not an unprimeable number, because it can be changed into a prime (42306989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10576745 + ... + 10576748.

Almost surely, 2^42306986 is an apocalyptic number.

42306986 is a deficient number, since it is larger than the sum of its proper divisors (21153496).

42306986 is a wasteful number, since it uses less digits than its factorization.

42306986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21153495.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 42306986 is about 6504.3820613491. The cubic root of 42306986 is about 348.4475074753.

The spelling of 42306986 in words is "forty-two million, three hundred six thousand, nine hundred eighty-six".