42547369 has 2 divisors, whose sum is σ = 42547370. Its totient is φ = 42547368.

The previous prime is 42547363. The next prime is 42547399. The reversal of 42547369 is 96374524.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39841344 + 2706025 = 6312^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 42547369 - 2²⁵ = 8992937 is a prime.

It is a super-3 number, since 3×42547369³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a zygodrome in base 3.

It is not a weakly prime, because it can be changed into another prime (42547363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21273684 + 21273685.

It is an arithmetic number, because the mean of its divisors is an integer number (21273685).

Almost surely, 2^42547369 is an apocalyptic number.

It is an amenable number.

42547369 is a deficient number, since it is larger than the sum of its proper divisors (1).

42547369 is an equidigital number, since it uses as much as digits as its factorization.

42547369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 42547369 is about 6522.8344299085. The cubic root of 42547369 is about 349.1062065413.

The spelling of 42547369 in words is "forty-two million, five hundred forty-seven thousand, three hundred sixty-nine".