42204409 has 8 divisors (see below), whose sum is σ = 45920840. Its totient is φ = 38555136.

The previous prime is 42204397. The next prime is 42204419. The reversal of 42204409 is 90440224.

It can be written as a sum of positive squares in 4 ways, for example, as 278784 + 41925625 = 528^2 + 6475^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42204409 - 2¹¹ = 42202361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42204419) 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, 15474 + ... + 17995.

It is an arithmetic number, because the mean of its divisors is an integer number (5740105).

Almost surely, 2^42204409 is an apocalyptic number.

It is an amenable number.

42204409 is a deficient number, since it is larger than the sum of its proper divisors (3716431).

42204409 is a wasteful number, since it uses less digits than its factorization.

42204409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33579.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 42204409 is about 6496.4920534085. The cubic root of 42204409 is about 348.1656657163.

The spelling of 42204409 in words is "forty-two million, two hundred four thousand, four hundred nine".