42790157 has 2 divisors, whose sum is σ = 42790158. Its totient is φ = 42790156.

The previous prime is 42790151. The next prime is 42790201. The reversal of 42790157 is 75109724.

42790157 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., 42784681 + 5476 = 6541^2 + 74^2 .

It is a cyclic number.

It is not a de Polignac number, because 42790157 - 2⁴ = 42790141 is a prime.

It is a Chen prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42790151) 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, 21395078 + 21395079.

It is an arithmetic number, because the mean of its divisors is an integer number (21395079).

Almost surely, 2^42790157 is an apocalyptic number.

It is an amenable number.

42790157 is a deficient number, since it is larger than the sum of its proper divisors (1).

42790157 is an equidigital number, since it uses as much as digits as its factorization.

42790157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 42790157 is about 6541.4185770366. The cubic root of 42790157 is about 349.7689822440.

The spelling of 42790157 in words is "forty-two million, seven hundred ninety thousand, one hundred fifty-seven".