42455837 has 2 divisors, whose sum is σ = 42455838. Its totient is φ = 42455836.

The previous prime is 42455821. The next prime is 42455839. The reversal of 42455837 is 73855424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36409156 + 6046681 = 6034^2 + 2459^2 .

It is a cyclic number.

It is not a de Polignac number, because 42455837 - 2⁴ = 42455821 is a prime.

Together with 42455839, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42455837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42455839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21227918 + 21227919.

It is an arithmetic number, because the mean of its divisors is an integer number (21227919).

Almost surely, 2^42455837 is an apocalyptic number.

It is an amenable number.

42455837 is a deficient number, since it is larger than the sum of its proper divisors (1).

42455837 is an equidigital number, since it uses as much as digits as its factorization.

42455837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 134400, while the sum is 38.

The square root of 42455837 is about 6515.8143773438. The cubic root of 42455837 is about 348.8556831684.

The spelling of 42455837 in words is "forty-two million, four hundred fifty-five thousand, eight hundred thirty-seven".