42215146 has 4 divisors (see below), whose sum is σ = 63322722. Its totient is φ = 21107572.

The previous prime is 42215141. The next prime is 42215161. The reversal of 42215146 is 64151224.

It is a happy number.

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., 24059025 + 18156121 = 4905^2 + 4261^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 42215146.

It is not an unprimeable number, because it can be changed into a prime (42215141) 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 as a sum of consecutive naturals, namely, 10553785 + ... + 10553788.

Almost surely, 2^42215146 is an apocalyptic number.

42215146 is a deficient number, since it is larger than the sum of its proper divisors (21107576).

42215146 is a wasteful number, since it uses less digits than its factorization.

42215146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21107575.

The product of its digits is 1920, while the sum is 25.

The square root of 42215146 is about 6497.3183699123. The cubic root of 42215146 is about 348.1951882068.

The spelling of 42215146 in words is "forty-two million, two hundred fifteen thousand, one hundred forty-six".