42293409 has 8 divisors (see below), whose sum is σ = 56476512. Its totient is φ = 28152960.

The previous prime is 42293387. The next prime is 42293429. The reversal of 42293409 is 90439224.

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

It is not a de Polignac number, because 42293409 - 2¹⁵ = 42260641 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42293409.

It is not an unprimeable number, because it can be changed into a prime (42293429) 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, 8272 + ... + 12369.

It is an arithmetic number, because the mean of its divisors is an integer number (7059564).

Almost surely, 2^42293409 is an apocalyptic number.

It is an amenable number.

42293409 is a deficient number, since it is larger than the sum of its proper divisors (14183103).

42293409 is a wasteful number, since it uses less digits than its factorization.

42293409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21327.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 42293409 is about 6503.3382965981. The cubic root of 42293409 is about 348.4102293296.

The spelling of 42293409 in words is "forty-two million, two hundred ninety-three thousand, four hundred nine".