42215284 has 12 divisors (see below), whose sum is σ = 78222564. Its totient is φ = 19865984.

The previous prime is 42215269. The next prime is 42215291. The reversal of 42215284 is 48251224.

It can be written as a sum of positive squares in 2 ways, for example, as 38688400 + 3526884 = 6220^2 + 1878^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 310339 + ... + 310474.

It is an arithmetic number, because the mean of its divisors is an integer number (6518547).

Almost surely, 2^42215284 is an apocalyptic number.

It is an amenable number.

42215284 is a deficient number, since it is larger than the sum of its proper divisors (36007280).

42215284 is a wasteful number, since it uses less digits than its factorization.

42215284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620834 (or 620832 counting only the distinct ones).

The product of its digits is 5120, while the sum is 28.

The square root of 42215284 is about 6497.3289896695. The cubic root of 42215284 is about 348.1955676195.

The spelling of 42215284 in words is "forty-two million, two hundred fifteen thousand, two hundred eighty-four".