1131775 has 12 divisors (see below), whose sum is σ = 1486512. Its totient is φ = 851840.

The previous prime is 1131769. The next prime is 1131787. The reversal of 1131775 is 5771311.

It is a de Polignac number, because none of the positive numbers 2^k-1131775 is a prime.

It is a super-3 number, since 3×1131775³ = 4349121536133328125, which contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 907 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (123876).

2^1131775 is an apocalyptic number.

1131775 is a deficient number, since it is larger than the sum of its proper divisors (354737).

1131775 is a wasteful number, since it uses less digits than its factorization.

1131775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2690 (or 2685 counting only the distinct ones).

The product of its digits is 735, while the sum is 25.

The square root of 1131775 is about 1063.8491434409. The cubic root of 1131775 is about 104.2125522288.

The spelling of 1131775 in words is "one million, one hundred thirty-one thousand, seven hundred seventy-five".