1131427 has 8 divisors (see below), whose sum is σ = 1252080. Its totient is φ = 1013760.

The previous prime is 1131421. The next prime is 1131437. The reversal of 1131427 is 7241311.

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

It is not a de Polignac number, because 1131427 - 2³ = 1131419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99 + ... + 1507.

It is an arithmetic number, because the mean of its divisors is an integer number (156510).

2^1131427 is an apocalyptic number.

1131427 is a deficient number, since it is larger than the sum of its proper divisors (120653).

1131427 is a wasteful number, since it uses less digits than its factorization.

1131427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493.

The product of its digits is 168, while the sum is 19.

The square root of 1131427 is about 1063.6855738422. The cubic root of 1131427 is about 104.2018699861.

Adding to 1131427 its reverse (7241311), we get a palindrome (8372738).

It can be divided in two parts, 113 and 1427, that added together give a triangular number (1540 = T₅₅).

The spelling of 1131427 in words is "one million, one hundred thirty-one thousand, four hundred twenty-seven".