42247685 has 8 divisors (see below), whose sum is σ = 51528696. Its totient is φ = 33243840.

The previous prime is 42247663. The next prime is 42247687. The reversal of 42247685 is 58674224.

It can be written as a sum of positive squares in 4 ways, for example, as 231361 + 42016324 = 481^2 + 6482^2 .

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

It is not a de Polignac number, because 42247685 - 2¹⁰ = 42246661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42247687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68954 + ... + 69563.

It is an arithmetic number, because the mean of its divisors is an integer number (6441087).

Almost surely, 2^42247685 is an apocalyptic number.

It is an amenable number.

42247685 is a deficient number, since it is larger than the sum of its proper divisors (9281011).

42247685 is a wasteful number, since it uses less digits than its factorization.

42247685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138583.

The product of its digits is 107520, while the sum is 38.

The square root of 42247685 is about 6499.8219206375. The cubic root of 42247685 is about 348.2846269869.

The spelling of 42247685 in words is "forty-two million, two hundred forty-seven thousand, six hundred eighty-five".