1020157 has 2 divisors, whose sum is σ = 1020158. Its totient is φ = 1020156.

The previous prime is 1020143. The next prime is 1020163. The reversal of 1020157 is 7510201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 972196 + 47961 = 986^2 + 219^2 .

It is an emirp because it is prime and its reverse (7510201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1020157 - 2¹¹ = 1018109 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020137) 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, 510078 + 510079.

It is an arithmetic number, because the mean of its divisors is an integer number (510079).

2^1020157 is an apocalyptic number.

It is an amenable number.

1020157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020157 is an equidigital number, since it uses as much as digits as its factorization.

1020157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 1020157 is about 1010.0282174276. The cubic root of 1020157 is about 100.6674353893.

Adding to 1020157 its reverse (7510201), we get a palindrome (8530358).

The spelling of 1020157 in words is "one million, twenty thousand, one hundred fifty-seven".