42125321 has 4 divisors (see below), whose sum is σ = 48143232. Its totient is φ = 36107412.

The previous prime is 42125297. The next prime is 42125333. The reversal of 42125321 is 12352124.

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 42125321 - 2¹⁰ = 42124297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42125293 and 42125302.

It is not an unprimeable number, because it can be changed into a prime (42125341) 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, 3008945 + ... + 3008958.

It is an arithmetic number, because the mean of its divisors is an integer number (12035808).

Almost surely, 2^42125321 is an apocalyptic number.

It is an amenable number.

42125321 is a deficient number, since it is larger than the sum of its proper divisors (6017911).

42125321 is an equidigital number, since it uses as much as digits as its factorization.

42125321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6017910.

The product of its digits is 480, while the sum is 20.

The square root of 42125321 is about 6490.4022217425. The cubic root of 42125321 is about 347.9480506635.

Adding to 42125321 its reverse (12352124), we get a palindrome (54477445).

The spelling of 42125321 in words is "forty-two million, one hundred twenty-five thousand, three hundred twenty-one".