42779125 has 8 divisors (see below), whose sum is σ = 53388504. Its totient is φ = 34223200.

The previous prime is 42779083. The next prime is 42779131. The reversal of 42779125 is 52197724.

42779125 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 4363921 + 38415204 = 2089^2 + 6198^2 .

It is not a de Polignac number, because 42779125 - 2¹⁵ = 42746357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 170992 + ... + 171241.

It is an arithmetic number, because the mean of its divisors is an integer number (6673563).

Almost surely, 2^42779125 is an apocalyptic number.

It is an amenable number.

42779125 is a deficient number, since it is larger than the sum of its proper divisors (10609379).

42779125 is an equidigital number, since it uses as much as digits as its factorization.

42779125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342248 (or 342238 counting only the distinct ones).

The product of its digits is 35280, while the sum is 37.

The square root of 42779125 is about 6540.5752805086. The cubic root of 42779125 is about 349.7389209453.

The spelling of 42779125 in words is "forty-two million, seven hundred seventy-nine thousand, one hundred twenty-five".