1131513 has 4 divisors (see below), whose sum is σ = 1508688. Its totient is φ = 754340.

The previous prime is 1131509. The next prime is 1131523. The reversal of 1131513 is 3151311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3151311 = 3 ⋅1050437.

It is a cyclic number.

It is not a de Polignac number, because 1131513 - 2² = 1131509 is a prime.

It is an Ulam number.

It is a D-number.

1131513 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1131492 and 1131501.

It is not an unprimeable number, because it can be changed into a prime (1131523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188583 + ... + 188588.

It is an arithmetic number, because the mean of its divisors is an integer number (377172).

2^1131513 is an apocalyptic number.

It is an amenable number.

1131513 is a deficient number, since it is larger than the sum of its proper divisors (377175).

1131513 is an equidigital number, since it uses as much as digits as its factorization.

1131513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377174.

The product of its digits is 45, while the sum is 15.

The square root of 1131513 is about 1063.7259985541. The cubic root of 1131513 is about 104.2045100544.

Adding to 1131513 its reverse (3151311), we get a palindrome (4282824).

It can be divided in two parts, 11 and 31513, that multiplied together give a palindrome (346643).

The spelling of 1131513 in words is "one million, one hundred thirty-one thousand, five hundred thirteen".