42620121 has 16 divisors (see below), whose sum is σ = 63331200. Its totient is φ = 28327824.

The previous prime is 42620087. The next prime is 42620129. The reversal of 42620121 is 12102624.

42620121 is a `hidden beast` number, since 42 + 620 + 1 + 2 + 1 = 666.

It is not a de Polignac number, because 42620121 - 2⁹ = 42619609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42620094 and 42620103.

It is not an unprimeable number, because it can be changed into a prime (42620129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7495 + ... + 11891.

It is an arithmetic number, because the mean of its divisors is an integer number (3958200).

Almost surely, 2^42620121 is an apocalyptic number.

It is an amenable number.

42620121 is a deficient number, since it is larger than the sum of its proper divisors (20711079).

42620121 is a wasteful number, since it uses less digits than its factorization.

42620121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765 (or 4759 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 42620121 is about 6528.4087647757. The cubic root of 42620121 is about 349.3050728317.

Adding to 42620121 its reverse (12102624), we get a palindrome (54722745).

The spelling of 42620121 in words is "forty-two million, six hundred twenty thousand, one hundred twenty-one".