42651225 has 48 divisors (see below), whose sum is σ = 79012800. Its totient is φ = 22556160.

The previous prime is 42651211. The next prime is 42651229. The reversal of 42651225 is 52215624.

42651225 is a `hidden beast` number, since 4 + 2 + 651 + 2 + 2 + 5 = 666.

42651225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42651225 - 2⁴ = 42651209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (42651229) 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 47 ways as a sum of consecutive naturals, for example, 120649 + ... + 121001.

It is an arithmetic number, because the mean of its divisors is an integer number (1646100).

Almost surely, 2^42651225 is an apocalyptic number.

42651225 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42651225 is a deficient number, since it is larger than the sum of its proper divisors (36361575).

42651225 is a wasteful number, since it uses less digits than its factorization.

42651225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 540 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 42651225 is about 6530.7905340778. The cubic root of 42651225 is about 349.3900260007.

Adding to 42651225 its reverse (52215624), we get a palindrome (94866849).

The spelling of 42651225 in words is "forty-two million, six hundred fifty-one thousand, two hundred twenty-five".