42021053 has 4 divisors (see below), whose sum is σ = 42076188. Its totient is φ = 41965920.

The previous prime is 42021043. The next prime is 42021071. The reversal of 42021053 is 35012024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11957764 + 30063289 = 3458^2 + 5483^2 .

It is a cyclic number.

It is not a de Polignac number, because 42021053 - 2⁴ = 42021037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021043) by changing a digit.

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, 26408 + ... + 27953.

It is an arithmetic number, because the mean of its divisors is an integer number (10519047).

Almost surely, 2^42021053 is an apocalyptic number.

It is an amenable number.

42021053 is a deficient number, since it is larger than the sum of its proper divisors (55135).

42021053 is an equidigital number, since it uses as much as digits as its factorization.

42021053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55134.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 42021053 is about 6482.3647691255. The cubic root of 42021053 is about 347.6607347782.

Adding to 42021053 its reverse (35012024), we get a palindrome (77033077).

The spelling of 42021053 in words is "forty-two million, twenty-one thousand, fifty-three".