42347685 has 32 divisors (see below), whose sum is σ = 71187840. Its totient is φ = 21466368.

The previous prime is 42347681. The next prime is 42347717. The reversal of 42347685 is 58674324.

It is a happy number.

It is not a de Polignac number, because 42347685 - 2² = 42347681 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42347681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28419 + ... + 29871.

It is an arithmetic number, because the mean of its divisors is an integer number (2224620).

Almost surely, 2^42347685 is an apocalyptic number.

It is an amenable number.

42347685 is a deficient number, since it is larger than the sum of its proper divisors (28840155).

42347685 is a wasteful number, since it uses less digits than its factorization.

42347685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1557.

The product of its digits is 161280, while the sum is 39.

The square root of 42347685 is about 6507.5098924243. The cubic root of 42347685 is about 348.5592062859.

The spelling of 42347685 in words is "forty-two million, three hundred forty-seven thousand, six hundred eighty-five".