1131568 has 20 divisors (see below), whose sum is σ = 2209680. Its totient is φ = 561344.

The previous prime is 1131553. The next prime is 1131569. The reversal of 1131568 is 8651311.

It is a super-2 number, since 2×1131568² = 2560892277248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1131569) 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, 2973 + ... + 3331.

It is an arithmetic number, because the mean of its divisors is an integer number (110484).

2^1131568 is an apocalyptic number.

It is an amenable number.

1131568 is a deficient number, since it is larger than the sum of its proper divisors (1078112).

1131568 is a wasteful number, since it uses less digits than its factorization.

1131568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564 (or 558 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 1131568 is about 1063.7518507622. The cubic root of 1131568 is about 104.2061984001.

Adding to 1131568 its reverse (8651311), we get a palindrome (9782879).

It can be divided in two parts, 11315 and 68, that multiplied together give a triangular number (769420 = T₁₂₄₀).

The spelling of 1131568 in words is "one million, one hundred thirty-one thousand, five hundred sixty-eight".