42957757 has 2 divisors, whose sum is σ = 42957758. Its totient is φ = 42957756.

The previous prime is 42957683. The next prime is 42957763. The reversal of 42957757 is 75775924.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31741956 + 11215801 = 5634^2 + 3349^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42957757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42957557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21478878 + 21478879.

It is an arithmetic number, because the mean of its divisors is an integer number (21478879).

Almost surely, 2^42957757 is an apocalyptic number.

It is an amenable number.

42957757 is a deficient number, since it is larger than the sum of its proper divisors (1).

42957757 is an equidigital number, since it uses as much as digits as its factorization.

42957757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 617400, while the sum is 46.

The square root of 42957757 is about 6554.2167342864. The cubic root of 42957757 is about 350.2250443847.

The spelling of 42957757 in words is "forty-two million, nine hundred fifty-seven thousand, seven hundred fifty-seven".