42212840 has 16 divisors (see below), whose sum is σ = 94978980. Its totient is φ = 16885120.

The previous prime is 42212839. The next prime is 42212867. The reversal of 42212840 is 4821224.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 42172036 + 40804 = 6494^2 + 202^2 .

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, 527621 + ... + 527700.

Almost surely, 2^42212840 is an apocalyptic number.

42212840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42212840 is an abundant number, since it is smaller than the sum of its proper divisors (52766140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42212840 is a wasteful number, since it uses less digits than its factorization.

42212840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055332 (or 1055328 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 42212840 is about 6497.1409096617. The cubic root of 42212840 is about 348.1888480438.

The spelling of 42212840 in words is "forty-two million, two hundred twelve thousand, eight hundred forty".