42562121 has 16 divisors (see below), whose sum is σ = 51093504. Its totient is φ = 34664784.
The previous prime is 42562087. The next prime is 42562129. The reversal of 42562121 is 12126524.
It is a happy number.
It is a de Polignac number, because none of the positive numbers 2k-42562121 is a prime.
It is a Harshad number since it is a multiple of its sum of digits (23).
It is not an unprimeable number, because it can be changed into a prime (42562129) 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 15 ways as a sum of consecutive naturals, for example, 26096 + ... + 27678.
It is an arithmetic number, because the mean of its divisors is an integer number (3193344).
Almost surely, 242562121 is an apocalyptic number.
It is an amenable number.
42562121 is a deficient number, since it is larger than the sum of its proper divisors (8531383).
42562121 is a wasteful number, since it uses less digits than its factorization.
42562121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1780.
The product of its digits is 960, while the sum is 23.
The square root of 42562121 is about 6523.9651286622. The cubic root of 42562121 is about 349.1465491821.
Adding to 42562121 its reverse (12126524), we get a palindrome (54688645).
The spelling of 42562121 in words is "forty-two million, five hundred sixty-two thousand, one hundred twenty-one".
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