42212530 has 16 divisors (see below), whose sum is σ = 80452440. Its totient is φ = 15891712.

The previous prime is 42212501. The next prime is 42212531. The reversal of 42212530 is 3521224.

It can be written as a sum of positive squares in 4 ways, for example, as 33074001 + 9138529 = 5751^2 + 3023^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42212498 and 42212507.

It is not an unprimeable number, because it can be changed into a prime (42212531) 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, 123985 + ... + 124324.

Almost surely, 2^42212530 is an apocalyptic number.

42212530 is a deficient number, since it is larger than the sum of its proper divisors (38239910).

42212530 is a wasteful number, since it uses less digits than its factorization.

42212530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248333.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 42212530 is about 6497.1170529705. The cubic root of 42212530 is about 348.1879957059.

Adding to 42212530 its reverse (3521224), we get a palindrome (45733754).

The spelling of 42212530 in words is "forty-two million, two hundred twelve thousand, five hundred thirty".