1131243268 has 12 divisors (see below), whose sum is σ = 1982740032. Its totient is φ = 564746120.

The previous prime is 1131243263. The next prime is 1131243277. The reversal of 1131243268 is 8623421311.

It is a super-2 number, since 2×1131243268² = 2559422662790639648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131243263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215968 + ... + 221143.

It is an arithmetic number, because the mean of its divisors is an integer number (165228336).

Almost surely, 2^1131243268 is an apocalyptic number.

It is an amenable number.

1131243268 is a deficient number, since it is larger than the sum of its proper divisors (851496764).

1131243268 is a wasteful number, since it uses less digits than its factorization.

1131243268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437762 (or 437760 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 1131243268 is about 33633.9600404115. The cubic root of 1131243268 is about 1041.9622924673.

Adding to 1131243268 its reverse (8623421311), we get a palindrome (9754664579).

The spelling of 1131243268 in words is "one billion, one hundred thirty-one million, two hundred forty-three thousand, two hundred sixty-eight".