1001328157 has 2 divisors, whose sum is σ = 1001328158. Its totient is φ = 1001328156.

The previous prime is 1001328113. The next prime is 1001328191. The reversal of 1001328157 is 7518231001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 958150116 + 43178041 = 30954^2 + 6571^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001328157 - 2¹⁵ = 1001295389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001328257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500664078 + 500664079.

It is an arithmetic number, because the mean of its divisors is an integer number (500664079).

Almost surely, 2^1001328157 is an apocalyptic number.

It is an amenable number.

1001328157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001328157 is an equidigital number, since it uses as much as digits as its factorization.

1001328157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 1001328157 is about 31643.7696395357. The cubic root of 1001328157 is about 1000.4425231444.

Adding to 1001328157 its reverse (7518231001), we get a palindrome (8519559158).

The spelling of 1001328157 in words is "one billion, one million, three hundred twenty-eight thousand, one hundred fifty-seven".