1131975 has 60 divisors (see below), whose sum is σ = 2310616. Its totient is φ = 544320.

The previous prime is 1131973. The next prime is 1131997. The reversal of 1131975 is 5791311.

It is a happy number.

It is not a de Polignac number, because 1131975 - 2¹ = 1131973 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131973) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 26304 + ... + 26346.

2^1131975 is an apocalyptic number.

1131975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1131975 is an abundant number, since it is smaller than the sum of its proper divisors (1178641).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131975 is a wasteful number, since it uses less digits than its factorization.

1131975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 64 counting only the distinct ones).

The product of its digits is 945, while the sum is 27.

The square root of 1131975 is about 1063.9431375783. The cubic root of 1131975 is about 104.2186904580.

The spelling of 1131975 in words is "one million, one hundred thirty-one thousand, nine hundred seventy-five".