42425040 has 80 divisors (see below), whose sum is σ = 150311808. Its totient is φ = 9696768.

The previous prime is 42425039. The next prime is 42425083. The reversal of 42425040 is 4052424.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 42424998 and 42425016.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10947 + ... + 14306.

Almost surely, 2^42425040 is an apocalyptic number.

42425040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42425040 is an abundant number, since it is smaller than the sum of its proper divisors (107886768).

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

42425040 is a wasteful number, since it uses less digits than its factorization.

42425040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25276 (or 25270 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 42425040 is about 6513.4506983626. The cubic root of 42425040 is about 348.7713107313.

Adding to 42425040 its reverse (4052424), we get a palindrome (46477464).

The spelling of 42425040 in words is "forty-two million, four hundred twenty-five thousand, forty".