42021130 has 8 divisors (see below), whose sum is σ = 75638052. Its totient is φ = 16808448.

The previous prime is 42021121. The next prime is 42021139. The reversal of 42021130 is 3112024.

42021130 is nontrivially palindromic in base 4.

It is an interprime number because it is at equal distance from previous prime (42021121) and next prime (42021139).

It can be written as a sum of positive squares in 2 ways, for example, as 33674809 + 8346321 = 5803^2 + 2889^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 42021130.

It is not an unprimeable number, because it can be changed into a prime (42021139) 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, 2101047 + ... + 2101066.

Almost surely, 2^42021130 is an apocalyptic number.

42021130 is a deficient number, since it is larger than the sum of its proper divisors (33616922).

42021130 is a wasteful number, since it uses less digits than its factorization.

42021130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202120.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 42021130 is about 6482.3707083134. The cubic root of 42021130 is about 347.6609471309.

Adding to 42021130 its reverse (3112024), we get a palindrome (45133154).

The spelling of 42021130 in words is "forty-two million, twenty-one thousand, one hundred thirty".