42567121 has 4 divisors (see below), whose sum is σ = 42591744. Its totient is φ = 42542500.

The previous prime is 42567113. The next prime is 42567149. The reversal of 42567121 is 12176524.

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 42567121 - 2³ = 42567113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42567121.

It is not an unprimeable number, because it can be changed into a prime (42567191) 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, 9505 + ... + 13246.

It is an arithmetic number, because the mean of its divisors is an integer number (10647936).

Almost surely, 2^42567121 is an apocalyptic number.

It is an amenable number.

42567121 is a deficient number, since it is larger than the sum of its proper divisors (24623).

42567121 is a wasteful number, since it uses less digits than its factorization.

42567121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24622.

The product of its digits is 3360, while the sum is 28.

The square root of 42567121 is about 6524.3483199474. The cubic root of 42567121 is about 349.1602206843.

The spelling of 42567121 in words is "forty-two million, five hundred sixty-seven thousand, one hundred twenty-one".