42841397 has 2 divisors, whose sum is σ = 42841398. Its totient is φ = 42841396.

The previous prime is 42841391. The next prime is 42841399. The reversal of 42841397 is 79314824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24940036 + 17901361 = 4994^2 + 4231^2 .

It is a cyclic number.

It is not a de Polignac number, because 42841397 - 2¹⁰ = 42840373 is a prime.

It is a super-3 number, since 3×42841397³ (a number of 24 digits) contains 333 as substring.

Together with 42841399, it forms a pair of twin primes.

It is a Chen prime.

It is a pancake number, because a pancake can be divided into 42841397 parts by 9256 straight cuts.

It is a self number, because there is not a number n which added to its sum of digits gives 42841397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42841391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21420698 + 21420699.

It is an arithmetic number, because the mean of its divisors is an integer number (21420699).

Almost surely, 2^42841397 is an apocalyptic number.

It is an amenable number.

42841397 is a deficient number, since it is larger than the sum of its proper divisors (1).

42841397 is an equidigital number, since it uses as much as digits as its factorization.

42841397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 38.

The square root of 42841397 is about 6545.3339868948. Note that the first 3 decimals coincide. The cubic root of 42841397 is about 349.9085393673.

The spelling of 42841397 in words is "forty-two million, eight hundred forty-one thousand, three hundred ninety-seven".