42425 has 6 divisors (see below), whose sum is σ = 52638. Its totient is φ = 33920.

The previous prime is 42409. The next prime is 42433. The reversal of 42425 is 52424.

It can be written as a sum of positive squares in 3 ways, for example, as 11449 + 30976 = 107^2 + 176^2 .

It is not a de Polignac number, because 42425 - 2⁴ = 42409 is a prime.

It is a Duffinian number.

It is a plaindrome in base 7.

It is a nialpdrome in base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 824 + ... + 873.

It is an arithmetic number, because the mean of its divisors is an integer number (8773).

2⁴²⁴²⁵ is an apocalyptic number.

It is an amenable number.

42425 is a deficient number, since it is larger than the sum of its proper divisors (10213).

42425 is a wasteful number, since it uses less digits than its factorization.

42425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1707 (or 1702 counting only the distinct ones).

The product of its digits is 320, while the sum is 17.

The square root of 42425 is about 205.9732992405. The cubic root of 42425 is about 34.8771201119.

Adding to 42425 its reverse (52424), we get a palindrome (94849).

Subtracting 42425 from its reverse (52424), we obtain a palindrome (9999).

The spelling of 42425 in words is "forty-two thousand, four hundred twenty-five".