42052409 has 8 divisors (see below), whose sum is σ = 49177920. Its totient is φ = 35206416.

The previous prime is 42052403. The next prime is 42052447. The reversal of 42052409 is 90425024.

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

It is not a de Polignac number, because 42052409 - 2¹² = 42048313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42052403) 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, 69554 + ... + 70155.

It is an arithmetic number, because the mean of its divisors is an integer number (6147240).

Almost surely, 2^42052409 is an apocalyptic number.

It is an amenable number.

42052409 is a deficient number, since it is larger than the sum of its proper divisors (7125511).

42052409 is a wasteful number, since it uses less digits than its factorization.

42052409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139759.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 42052409 is about 6484.7828799429. The cubic root of 42052409 is about 347.7471877888.

The spelling of 42052409 in words is "forty-two million, fifty-two thousand, four hundred nine".