42700725 has 36 divisors (see below), whose sum is σ = 76993956. Its totient is φ = 22621440.

The previous prime is 42700717. The next prime is 42700727. The reversal of 42700725 is 52700724.

It can be written as a sum of positive squares in 6 ways, for example, as 7569 + 42693156 = 87^2 + 6534^2 .

It is not a de Polignac number, because 42700725 - 2³ = 42700717 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42700727) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38377 + ... + 39473.

It is an arithmetic number, because the mean of its divisors is an integer number (2138721).

Almost surely, 2^42700725 is an apocalyptic number.

42700725 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42700725 is a deficient number, since it is larger than the sum of its proper divisors (34293231).

42700725 is a wasteful number, since it uses less digits than its factorization.

42700725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 42700725 is about 6534.5791754328. The cubic root of 42700725 is about 349.5251383369.

Subtracting 42700725 from its reverse (52700724), we obtain a palindrome (9999999).

The spelling of 42700725 in words is "forty-two million, seven hundred thousand, seven hundred twenty-five".