42730725 has 24 divisors (see below), whose sum is σ = 71309920. Its totient is φ = 22576320.

The previous prime is 42730703. The next prime is 42730729. The reversal of 42730725 is 52703724.

It is not a de Polignac number, because 42730725 - 2¹⁴ = 42714341 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42730692 and 42730701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42730729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5562 + ... + 10788.

Almost surely, 2^42730725 is an apocalyptic number.

It is an amenable number.

42730725 is a deficient number, since it is larger than the sum of its proper divisors (28579195).

42730725 is a wasteful number, since it uses less digits than its factorization.

42730725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5349 (or 5344 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 30.

The square root of 42730725 is about 6536.8742530356. The cubic root of 42730725 is about 349.6069737895.

The spelling of 42730725 in words is "forty-two million, seven hundred thirty thousand, seven hundred twenty-five".