42425440 has 48 divisors (see below), whose sum is σ = 102141648. Its totient is φ = 16646656.

The previous prime is 42425437. The next prime is 42425459. The reversal of 42425440 is 4452424.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 5979 + ... + 10981.

It is an arithmetic number, because the mean of its divisors is an integer number (2127951).

Almost surely, 2^42425440 is an apocalyptic number.

42425440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42425440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51070824).

42425440 is an abundant number, since it is smaller than the sum of its proper divisors (59716208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42425440 is a wasteful number, since it uses less digits than its factorization.

42425440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071 (or 5063 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 42425440 is about 6513.4814039805. The cubic root of 42425440 is about 348.7724068456.

Adding to 42425440 its reverse (4452424), we get a palindrome (46877864).

The spelling of 42425440 in words is "forty-two million, four hundred twenty-five thousand, four hundred forty".