42646225 has 6 divisors (see below), whose sum is σ = 52881350. Its totient is φ = 34116960.

The previous prime is 42646199. The next prime is 42646229. The reversal of 42646225 is 52264624.

42646225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 746496 + 41899729 = 864^2 + 6473^2 .

It is not a de Polignac number, because 42646225 - 2⁵ = 42646193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42646229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 852900 + ... + 852949.

Almost surely, 2^42646225 is an apocalyptic number.

It is an amenable number.

42646225 is a deficient number, since it is larger than the sum of its proper divisors (10235125).

42646225 is a wasteful number, since it uses less digits than its factorization.

42646225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1705859 (or 1705854 counting only the distinct ones).

The product of its digits is 23040, while the sum is 31.

The square root of 42646225 is about 6530.4077208089. The cubic root of 42646225 is about 349.3763724781.

The spelling of 42646225 in words is "forty-two million, six hundred forty-six thousand, two hundred twenty-five".