42121626 has 8 divisors (see below), whose sum is σ = 84243264. Its totient is φ = 14040540.

The previous prime is 42121621. The next prime is 42121643. The reversal of 42121626 is 62612124.

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

42121626 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 42121596 and 42121605.

It is not an unprimeable number, because it can be changed into a prime (42121621) 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, 3510130 + ... + 3510141.

It is an arithmetic number, because the mean of its divisors is an integer number (10530408).

Almost surely, 2^42121626 is an apocalyptic number.

42121626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42121626 is a wasteful number, since it uses less digits than its factorization.

42121626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7020276.

The product of its digits is 1152, while the sum is 24.

The square root of 42121626 is about 6490.1175644205. The cubic root of 42121626 is about 347.9378770070.

The spelling of 42121626 in words is "forty-two million, one hundred twenty-one thousand, six hundred twenty-six".