1131201 has 24 divisors (see below), whose sum is σ = 1738880. Its totient is φ = 707616.

The previous prime is 1131191. The next prime is 1131217. The reversal of 1131201 is 1021311.

It is not a de Polignac number, because 1131201 - 2¹¹ = 1129153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14280 + ... + 14358.

2^1131201 is an apocalyptic number.

It is an amenable number.

1131201 is a deficient number, since it is larger than the sum of its proper divisors (607679).

1131201 is a wasteful number, since it uses less digits than its factorization.

1131201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 9.

The square root of 1131201 is about 1063.5793341354. The cubic root of 1131201 is about 104.1949314943.

Adding to 1131201 its reverse (1021311), we get a palindrome (2152512).

The spelling of 1131201 in words is "one million, one hundred thirty-one thousand, two hundred one".