42021201 has 4 divisors (see below), whose sum is σ = 56028272. Its totient is φ = 28014132.

The previous prime is 42021173. The next prime is 42021211. The reversal of 42021201 is 10212024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 42021201 - 2⁷ = 42021073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42021211) 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, 7003531 + ... + 7003536.

It is an arithmetic number, because the mean of its divisors is an integer number (14007068).

Almost surely, 2^42021201 is an apocalyptic number.

It is an amenable number.

42021201 is a deficient number, since it is larger than the sum of its proper divisors (14007071).

42021201 is a wasteful number, since it uses less digits than its factorization.

42021201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14007070.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 42021201 is about 6482.3761847026. The cubic root of 42021201 is about 347.6611429365.

Adding to 42021201 its reverse (10212024), we get a palindrome (52233225).

The spelling of 42021201 in words is "forty-two million, twenty-one thousand, two hundred one".