42609225 has 48 divisors (see below), whose sum is σ = 77887872. Its totient is φ = 20444160.

The previous prime is 42609223. The next prime is 42609227. The reversal of 42609225 is 52290624.

It is an interprime number because it is at equal distance from previous prime (42609223) and next prime (42609227).

It is not a de Polignac number, because 42609225 - 2¹ = 42609223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42609192 and 42609201.

It is not an unprimeable number, because it can be changed into a prime (42609223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28599 + ... + 30051.

It is an arithmetic number, because the mean of its divisors is an integer number (1622664).

Almost surely, 2^42609225 is an apocalyptic number.

It is an amenable number.

42609225 is a deficient number, since it is larger than the sum of its proper divisors (35278647).

42609225 is a wasteful number, since it uses less digits than its factorization.

42609225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1501 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 42609225 is about 6527.5742048635. The cubic root of 42609225 is about 349.2753032270.

Adding to 42609225 its reverse (52290624), we get a palindrome (94899849).

The spelling of 42609225 in words is "forty-two million, six hundred nine thousand, two hundred twenty-five".