42060021 has 4 divisors (see below), whose sum is σ = 56080032. Its totient is φ = 28040012.

The previous prime is 42060019. The next prime is 42060037. The reversal of 42060021 is 12006024.

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 a cyclic number.

It is not a de Polignac number, because 42060021 - 2¹ = 42060019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42060061) 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, 7010001 + ... + 7010006.

It is an arithmetic number, because the mean of its divisors is an integer number (14020008).

Almost surely, 2^42060021 is an apocalyptic number.

It is an amenable number.

42060021 is a deficient number, since it is larger than the sum of its proper divisors (14020011).

42060021 is a wasteful number, since it uses less digits than its factorization.

42060021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14020010.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 42060021 is about 6485.3697658653. The cubic root of 42060021 is about 347.7681686867.

Adding to 42060021 its reverse (12006024), we get a palindrome (54066045).

The spelling of 42060021 in words is "forty-two million, sixty thousand, twenty-one".