42150121 has 12 divisors (see below), whose sum is σ = 45826128. Its totient is φ = 38751024.

The previous prime is 42150047. The next prime is 42150149. The reversal of 42150121 is 12105124.

It is not a de Polignac number, because 42150121 - 2⁹ = 42149609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42150095 and 42150104.

It is not an unprimeable number, because it can be changed into a prime (42150161) 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 11 ways as a sum of consecutive naturals, for example, 74586 + ... + 75148.

It is an arithmetic number, because the mean of its divisors is an integer number (3818844).

Almost surely, 2^42150121 is an apocalyptic number.

It is an amenable number.

42150121 is a deficient number, since it is larger than the sum of its proper divisors (3676007).

42150121 is a wasteful number, since it uses less digits than its factorization.

42150121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1032 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 42150121 is about 6492.3124539720. The cubic root of 42150121 is about 348.0163185416.

Adding to 42150121 its reverse (12105124), we get a palindrome (54255245).

The spelling of 42150121 in words is "forty-two million, one hundred fifty thousand, one hundred twenty-one".