42126530 has 8 divisors (see below), whose sum is σ = 75827772. Its totient is φ = 16850608.

The previous prime is 42126521. The next prime is 42126533. The reversal of 42126530 is 3562124.

It can be written as a sum of positive squares in 2 ways, for example, as 39400729 + 2725801 = 6277^2 + 1651^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 42126496 and 42126505.

It is not an unprimeable number, because it can be changed into a prime (42126533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2106317 + ... + 2106336.

Almost surely, 2^42126530 is an apocalyptic number.

42126530 is a deficient number, since it is larger than the sum of its proper divisors (33701242).

42126530 is a wasteful number, since it uses less digits than its factorization.

42126530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4212660.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 42126530 is about 6490.4953585994. The cubic root of 42126530 is about 347.9513793437.

Adding to 42126530 its reverse (3562124), we get a palindrome (45688654).

The spelling of 42126530 in words is "forty-two million, one hundred twenty-six thousand, five hundred thirty".