42111225 has 48 divisors (see below), whose sum is σ = 83328000. Its totient is φ = 20727360.

The previous prime is 42111211. The next prime is 42111247. The reversal of 42111225 is 52211124.

It is not a de Polignac number, because 42111225 - 2⁸ = 42110969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42111198 and 42111207.

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 47 ways as a sum of consecutive naturals, for example, 6376 + ... + 11174.

It is an arithmetic number, because the mean of its divisors is an integer number (1736000).

Almost surely, 2^42111225 is an apocalyptic number.

42111225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42111225 is a deficient number, since it is larger than the sum of its proper divisors (41216775).

42111225 is a wasteful number, since it uses less digits than its factorization.

42111225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831 (or 4820 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 42111225 is about 6489.3162197569. The cubic root of 42111225 is about 347.9092361392.

Adding to 42111225 its reverse (52211124), we get a palindrome (94322349).

The spelling of 42111225 in words is "forty-two million, one hundred eleven thousand, two hundred twenty-five".