42782741 has 2 divisors, whose sum is σ = 42782742. Its totient is φ = 42782740.

The previous prime is 42782717. The next prime is 42782749. The reversal of 42782741 is 14728724.

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., 36300625 + 6482116 = 6025^2 + 2546^2 .

It is a cyclic number.

It is not a de Polignac number, because 42782741 - 2¹⁴ = 42766357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42782749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21391370 + 21391371.

It is an arithmetic number, because the mean of its divisors is an integer number (21391371).

Almost surely, 2^42782741 is an apocalyptic number.

It is an amenable number.

42782741 is a deficient number, since it is larger than the sum of its proper divisors (1).

42782741 is an equidigital number, since it uses as much as digits as its factorization.

42782741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25088, while the sum is 35.

The square root of 42782741 is about 6540.8517029512. The cubic root of 42782741 is about 349.7487748192.

The spelling of 42782741 in words is "forty-two million, seven hundred eighty-two thousand, seven hundred forty-one".