42681225 has 12 divisors (see below), whose sum is σ = 70566416. Its totient is φ = 22763280.

The previous prime is 42681209. The next prime is 42681227. The reversal of 42681225 is 52218624.

It is not a de Polignac number, because 42681225 - 2⁴ = 42681209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42681192 and 42681201.

It is not an unprimeable number, because it can be changed into a prime (42681227) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 284467 + ... + 284616.

Almost surely, 2^42681225 is an apocalyptic number.

It is an amenable number.

42681225 is a deficient number, since it is larger than the sum of its proper divisors (27885191).

42681225 is a wasteful number, since it uses less digits than its factorization.

42681225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 569096 (or 569091 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 42681225 is about 6533.0869426329. The cubic root of 42681225 is about 349.4719247363.

Adding to 42681225 its reverse (52218624), we get a palindrome (94899849).

The spelling of 42681225 in words is "forty-two million, six hundred eighty-one thousand, two hundred twenty-five".