1125549 has 8 divisors (see below), whose sum is σ = 1667520. Its totient is φ = 750348.

The previous prime is 1125539. The next prime is 1125557. The reversal of 1125549 is 9455211.

1125549 is a `hidden beast` number, since 112 + 5 + 549 = 666.

It is not a de Polignac number, because 1125549 - 2¹¹ = 1123501 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 41687 = 1125549 / (1 + 1 + 2 + 5 + 5 + 4 + 9).

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20817 + ... + 20870.

It is an arithmetic number, because the mean of its divisors is an integer number (208440).

2^1125549 is an apocalyptic number.

It is an amenable number.

1125549 is a deficient number, since it is larger than the sum of its proper divisors (541971).

1125549 is an equidigital number, since it uses as much as digits as its factorization.

1125549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41696 (or 41690 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1125549 is about 1060.9189412957. The cubic root of 1125549 is about 104.0211064164.

The spelling of 1125549 in words is "one million, one hundred twenty-five thousand, five hundred forty-nine".