1001157 has 4 divisors (see below), whose sum is σ = 1334880. Its totient is φ = 667436.

The previous prime is 1001153. The next prime is 1001159. The reversal of 1001157 is 7511001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1001157 - 2² = 1001153 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 166857 + ... + 166862.

It is an arithmetic number, because the mean of its divisors is an integer number (333720).

2^1001157 is an apocalyptic number.

It is an amenable number.

1001157 is a deficient number, since it is larger than the sum of its proper divisors (333723).

1001157 is an equidigital number, since it uses as much as digits as its factorization.

1001157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333722.

The product of its (nonzero) digits is 35, while the sum is 15.

The square root of 1001157 is about 1000.5783327656. The cubic root of 1001157 is about 100.0385518023.

Adding to 1001157 its reverse (7511001), we get a palindrome (8512158).

The spelling of 1001157 in words is "one million, one thousand, one hundred fifty-seven".