1000157 has 4 divisors (see below), whose sum is σ = 1002396. Its totient is φ = 997920.

The previous prime is 1000151. The next prime is 1000159. The reversal of 1000157 is 7510001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7510001 = 37 ⋅202973.

It can be written as a sum of positive squares in 2 ways, for example, as 337561 + 662596 = 581^2 + 814^2 .

It is a cyclic number.

It is not a de Polignac number, because 1000157 - 2¹⁰ = 999133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194 + ... + 1427.

It is an arithmetic number, because the mean of its divisors is an integer number (250599).

2^1000157 is an apocalyptic number.

It is an amenable number.

1000157 is a deficient number, since it is larger than the sum of its proper divisors (2239).

1000157 is an equidigital number, since it uses as much as digits as its factorization.

1000157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2238.

The product of its (nonzero) digits is 35, while the sum is 14.

The square root of 1000157 is about 1000.0784969191. The cubic root of 1000157 is about 100.0052330595.

Adding to 1000157 its reverse (7510001), we get a palindrome (8510158).

The spelling of 1000157 in words is "one million, one hundred fifty-seven", and thus it is an aban number.