42151841 has 2 divisors, whose sum is σ = 42151842. Its totient is φ = 42151840.

The previous prime is 42151829. The next prime is 42151849. The reversal of 42151841 is 14815124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39639616 + 2512225 = 6296^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 42151841 - 2²² = 37957537 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 42151841.

It is not a weakly prime, because it can be changed into another prime (42151849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21075920 + 21075921.

It is an arithmetic number, because the mean of its divisors is an integer number (21075921).

Almost surely, 2^42151841 is an apocalyptic number.

It is an amenable number.

42151841 is a deficient number, since it is larger than the sum of its proper divisors (1).

42151841 is an equidigital number, since it uses as much as digits as its factorization.

42151841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 26.

The square root of 42151841 is about 6492.4449169785. Note that the first 3 decimals coincide. The cubic root of 42151841 is about 348.0210522562.

Adding to 42151841 its reverse (14815124), we get a palindrome (56966965).

The spelling of 42151841 in words is "forty-two million, one hundred fifty-one thousand, eight hundred forty-one".