42744277 has 2 divisors, whose sum is σ = 42744278. Its totient is φ = 42744276.

The previous prime is 42744271. The next prime is 42744313. The reversal of 42744277 is 77244724.

It is a happy number.

42744277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41396356 + 1347921 = 6434^2 + 1161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42744277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42744271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21372138 + 21372139.

It is an arithmetic number, because the mean of its divisors is an integer number (21372139).

Almost surely, 2^42744277 is an apocalyptic number.

It is an amenable number.

42744277 is a deficient number, since it is larger than the sum of its proper divisors (1).

42744277 is an equidigital number, since it uses as much as digits as its factorization.

42744277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87808, while the sum is 37.

The square root of 42744277 is about 6537.9107519146. The cubic root of 42744277 is about 349.6439290321.

The spelling of 42744277 in words is "forty-two million, seven hundred forty-four thousand, two hundred seventy-seven".