42725189 has 4 divisors (see below), whose sum is σ = 46011756. Its totient is φ = 39438624.

The previous prime is 42725171. The next prime is 42725201. The reversal of 42725189 is 98152724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26604964 + 16120225 = 5158^2 + 4015^2 .

It is a cyclic number.

It is not a de Polignac number, because 42725189 - 2⁸ = 42724933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42725489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1643264 + ... + 1643289.

It is an arithmetic number, because the mean of its divisors is an integer number (11502939).

Almost surely, 2^42725189 is an apocalyptic number.

It is an amenable number.

42725189 is a deficient number, since it is larger than the sum of its proper divisors (3286567).

42725189 is a wasteful number, since it uses less digits than its factorization.

42725189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3286566.

The product of its digits is 40320, while the sum is 38.

The square root of 42725189 is about 6536.4507953476. The cubic root of 42725189 is about 349.5918753032.

The spelling of 42725189 in words is "forty-two million, seven hundred twenty-five thousand, one hundred eighty-nine".