42421325 has 12 divisors (see below), whose sum is σ = 52684128. Its totient is φ = 33884400.

The previous prime is 42421321. The next prime is 42421363. The reversal of 42421325 is 52312424.

It is a happy number.

It is not a de Polignac number, because 42421325 - 2² = 42421321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42421325.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27320 + ... + 28830.

It is an arithmetic number, because the mean of its divisors is an integer number (4390344).

Almost surely, 2^42421325 is an apocalyptic number.

It is an amenable number.

42421325 is a deficient number, since it is larger than the sum of its proper divisors (10262803).

42421325 is a wasteful number, since it uses less digits than its factorization.

42421325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644 (or 2639 counting only the distinct ones).

The product of its digits is 1920, while the sum is 23.

The square root of 42421325 is about 6513.1655130205. The cubic root of 42421325 is about 348.7611302401.

Adding to 42421325 its reverse (52312424), we get a palindrome (94733749).

The spelling of 42421325 in words is "forty-two million, four hundred twenty-one thousand, three hundred twenty-five".