42017725 has 6 divisors (see below), whose sum is σ = 52102010. Its totient is φ = 33614160.

The previous prime is 42017707. The next prime is 42017747. The reversal of 42017725 is 52771024.

It can be written as a sum of positive squares in 3 ways, for example, as 363609 + 41654116 = 603^2 + 6454^2 .

It is not a de Polignac number, because 42017725 - 2⁷ = 42017597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42017693 and 42017702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 840330 + ... + 840379.

Almost surely, 2^42017725 is an apocalyptic number.

It is an amenable number.

42017725 is a deficient number, since it is larger than the sum of its proper divisors (10084285).

42017725 is a wasteful number, since it uses less digits than its factorization.

42017725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680719 (or 1680714 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 42017725 is about 6482.1080675965. The cubic root of 42017725 is about 347.6515564783.

Adding to 42017725 its reverse (52771024), we get a palindrome (94788749).

It can be divided in two parts, 420 and 17725, that added together give a triangular number (18145 = T₁₉₀).

The spelling of 42017725 in words is "forty-two million, seventeen thousand, seven hundred twenty-five".