42445157 has 2 divisors, whose sum is σ = 42445158. Its totient is φ = 42445156.

The previous prime is 42445153. The next prime is 42445177. The reversal of 42445157 is 75154424.

42445157 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., 39929761 + 2515396 = 6319^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 42445157 - 2² = 42445153 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42445153) 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, 21222578 + 21222579.

It is an arithmetic number, because the mean of its divisors is an integer number (21222579).

Almost surely, 2^42445157 is an apocalyptic number.

It is an amenable number.

42445157 is a deficient number, since it is larger than the sum of its proper divisors (1).

42445157 is an equidigital number, since it uses as much as digits as its factorization.

42445157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 32.

The square root of 42445157 is about 6514.9947812719. The cubic root of 42445157 is about 348.8264285247.

The spelling of 42445157 in words is "forty-two million, four hundred forty-five thousand, one hundred fifty-seven".