42660725 has 12 divisors (see below), whose sum is σ = 54026304. Its totient is φ = 33401520.

The previous prime is 42660677. The next prime is 42660727. The reversal of 42660725 is 52706624.

It is not a de Polignac number, because 42660725 - 2²⁰ = 41612149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42660691 and 42660700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42660727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16979 + ... + 19328.

It is an arithmetic number, because the mean of its divisors is an integer number (4502192).

Almost surely, 2^42660725 is an apocalyptic number.

It is an amenable number.

42660725 is a deficient number, since it is larger than the sum of its proper divisors (11365579).

42660725 is a wasteful number, since it uses less digits than its factorization.

42660725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36364 (or 36359 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 42660725 is about 6531.5178174755. The cubic root of 42660725 is about 349.4159647542.

The spelling of 42660725 in words is "forty-two million, six hundred sixty thousand, seven hundred twenty-five".