1131245 has 8 divisors (see below), whose sum is σ = 1380120. Its totient is φ = 889920.

The previous prime is 1131239. The next prime is 1131253. The reversal of 1131245 is 5421311.

It can be written as a sum of positive squares in 4 ways, for example, as 11881 + 1119364 = 109^2 + 1058^2 .

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

It is not a de Polignac number, because 1131245 - 2⁶ = 1131181 is a prime.

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, 1550 + ... + 2159.

It is an arithmetic number, because the mean of its divisors is an integer number (172515).

2^1131245 is an apocalyptic number.

It is an amenable number.

1131245 is a deficient number, since it is larger than the sum of its proper divisors (248875).

1131245 is an equidigital number, since it uses as much as digits as its factorization.

1131245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3775.

The product of its digits is 120, while the sum is 17.

The square root of 1131245 is about 1063.6000188041. The cubic root of 1131245 is about 104.1962824236.

Adding to 1131245 its reverse (5421311), we get a palindrome (6552556).

The spelling of 1131245 in words is "one million, one hundred thirty-one thousand, two hundred forty-five".