42841809 has 6 divisors (see below), whose sum is σ = 61882626. Its totient is φ = 28561200.

The previous prime is 42841807. The next prime is 42841811. The reversal of 42841809 is 90814824.

It is an interprime number because it is at equal distance from previous prime (42841807) and next prime (42841811).

It can be written as a sum of positive squares in only one way, i.e., 35141184 + 7700625 = 5928^2 + 2775^2 .

It is not a de Polignac number, because 42841809 - 2¹ = 42841807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42841807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2380092 + ... + 2380109.

It is an arithmetic number, because the mean of its divisors is an integer number (10313771).

Almost surely, 2^42841809 is an apocalyptic number.

It is an amenable number.

42841809 is a deficient number, since it is larger than the sum of its proper divisors (19040817).

42841809 is a wasteful number, since it uses less digits than its factorization.

42841809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4760207 (or 4760204 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 42841809 is about 6545.3654596210. The cubic root of 42841809 is about 349.9096610382.

The spelling of 42841809 in words is "forty-two million, eight hundred forty-one thousand, eight hundred nine".