8442157 has 2 divisors, whose sum is σ = 8442158. Its totient is φ = 8442156.

The previous prime is 8442151. The next prime is 8442167. The reversal of 8442157 is 7512448.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6869641 + 1572516 = 2621^2 + 1254^2 .

It is a cyclic number.

It is not a de Polignac number, because 8442157 - 2⁷ = 8442029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8442151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4221078 + 4221079.

It is an arithmetic number, because the mean of its divisors is an integer number (4221079).

Almost surely, 2^8442157 is an apocalyptic number.

It is an amenable number.

8442157 is a deficient number, since it is larger than the sum of its proper divisors (1).

8442157 is an equidigital number, since it uses as much as digits as its factorization.

8442157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8960, while the sum is 31.

The square root of 8442157 is about 2905.5390205606. The cubic root of 8442157 is about 203.6187692975.

The spelling of 8442157 in words is "eight million, four hundred forty-two thousand, one hundred fifty-seven".