42248709 has 36 divisors (see below), whose sum is σ = 65554944. Its totient is φ = 27188784.

The previous prime is 42248707. The next prime is 42248729. The reversal of 42248709 is 90784224.

It is not a de Polignac number, because 42248709 - 2¹ = 42248707 is a prime.

It is a Curzon number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42248707) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 332604 + ... + 332730.

Almost surely, 2^42248709 is an apocalyptic number.

It is an amenable number.

42248709 is a deficient number, since it is larger than the sum of its proper divisors (23306235).

42248709 is an equidigital number, since it uses as much as digits as its factorization.

42248709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 42248709 is about 6499.9006915491. The cubic root of 42248709 is about 348.2874408735.

The spelling of 42248709 in words is "forty-two million, two hundred forty-eight thousand, seven hundred nine".