42020725 has 12 divisors (see below), whose sum is σ = 52885504. Its totient is φ = 33113520.

The previous prime is 42020687. The next prime is 42020729. The reversal of 42020725 is 52702024.

42020725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42020725 - 2⁷ = 42020597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42020696 and 42020705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10869 + ... + 14218.

Almost surely, 2^42020725 is an apocalyptic number.

It is an amenable number.

42020725 is a deficient number, since it is larger than the sum of its proper divisors (10864779).

42020725 is a wasteful number, since it uses less digits than its factorization.

42020725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25164 (or 25159 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 42020725 is about 6482.3394696668. The cubic root of 42020725 is about 347.6598302076.

Adding to 42020725 its reverse (52702024), we get a palindrome (94722749).

The spelling of 42020725 in words is "forty-two million, twenty thousand, seven hundred twenty-five".