1001131 has 4 divisors (see below), whose sum is σ = 1008000. Its totient is φ = 994264.

The previous prime is 1001123. The next prime is 1001153. The reversal of 1001131 is 1311001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001131 - 2³ = 1001123 is a prime.

It is a super-2 number, since 2×1001131² = 2004526558322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001191) 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, 3211 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (252000).

2^1001131 is an apocalyptic number.

1001131 is a deficient number, since it is larger than the sum of its proper divisors (6869).

1001131 is an equidigital number, since it uses as much as digits as its factorization.

1001131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6868.

The product of its (nonzero) digits is 3, while the sum is 7.

The square root of 1001131 is about 1000.5653401952. The cubic root of 1001131 is about 100.0376857960.

Adding to 1001131 its reverse (1311001), we get a palindrome (2312132).

It can be divided in two parts, 1001 and 131, that multiplied together give a palindrome (131131).

The spelling of 1001131 in words is "one million, one thousand, one hundred thirty-one".