42725929 has 8 divisors (see below), whose sum is σ = 43556040. Its totient is φ = 41904000.

The previous prime is 42725911. The next prime is 42725933. The reversal of 42725929 is 92952724.

42725929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 24235929 + 18490000 = 4923^2 + 4300^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42725929 - 2²⁵ = 9171497 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42725891 and 42725900.

It is not an unprimeable number, because it can be changed into a prime (42725999) 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 7 ways as a sum of consecutive naturals, for example, 9069 + ... + 12949.

It is an arithmetic number, because the mean of its divisors is an integer number (5444505).

Almost surely, 2^42725929 is an apocalyptic number.

It is an amenable number.

42725929 is a deficient number, since it is larger than the sum of its proper divisors (830111).

42725929 is a wasteful number, since it uses less digits than its factorization.

42725929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4091.

The product of its digits is 90720, while the sum is 40.

The square root of 42725929 is about 6536.5074007454. The cubic root of 42725929 is about 349.5938936012.

It can be divided in two parts, 4272 and 5929, that added together give a palindrome (10201).

The spelling of 42725929 in words is "forty-two million, seven hundred twenty-five thousand, nine hundred twenty-nine".