1131243245 has 16 divisors (see below), whose sum is σ = 1481580288. Its totient is φ = 822344640.

The previous prime is 1131243233. The next prime is 1131243251. The reversal of 1131243245 is 5423421311.

It is a happy number.

1131243245 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1131243245 - 2⁶ = 1131243181 is a prime.

It is a super-2 number, since 2×1131243245² = 2559422558716260050, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 184367 + ... + 190403.

It is an arithmetic number, because the mean of its divisors is an integer number (92598768).

Almost surely, 2^1131243245 is an apocalyptic number.

It is an amenable number.

1131243245 is a deficient number, since it is larger than the sum of its proper divisors (350337043).

1131243245 is a wasteful number, since it uses less digits than its factorization.

1131243245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9460.

The product of its digits is 2880, while the sum is 26.

The square root of 1131243245 is about 33633.9596984952. The cubic root of 1131243245 is about 1041.9622854057.

Adding to 1131243245 its reverse (5423421311), we get a palindrome (6554664556).

The spelling of 1131243245 in words is "one billion, one hundred thirty-one million, two hundred forty-three thousand, two hundred forty-five".