1131445 has 8 divisors (see below), whose sum is σ = 1551744. Its totient is φ = 775824.

The previous prime is 1131437. The next prime is 1131451. The reversal of 1131445 is 5441311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131445 - 2³ = 1131437 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16129 + ... + 16198.

It is an arithmetic number, because the mean of its divisors is an integer number (193968).

2^1131445 is an apocalyptic number.

It is an amenable number.

1131445 is a deficient number, since it is larger than the sum of its proper divisors (420299).

1131445 is an equidigital number, since it uses as much as digits as its factorization.

1131445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32339.

The product of its digits is 240, while the sum is 19.

The square root of 1131445 is about 1063.6940349555. The cubic root of 1131445 is about 104.2024225696.

Adding to 1131445 its reverse (5441311), we get a palindrome (6572756).

The spelling of 1131445 in words is "one million, one hundred thirty-one thousand, four hundred forty-five".