1125531 has 12 divisors (see below), whose sum is σ = 1773720. Its totient is φ = 682080.

The previous prime is 1125529. The next prime is 1125539. The reversal of 1125531 is 1355211.

1125531 is a `hidden beast` number, since 112 + 553 + 1 = 666.

It is not a de Polignac number, because 1125531 - 2¹ = 1125529 is a prime.

It is a super-2 number, since 2×1125531² = 2533640063922, which contains 22 as substring.

1125531 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1125539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5586 + ... + 5783.

It is an arithmetic number, because the mean of its divisors is an integer number (147810).

2^1125531 is an apocalyptic number.

1125531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1125531 is a deficient number, since it is larger than the sum of its proper divisors (648189).

1125531 is a wasteful number, since it uses less digits than its factorization.

1125531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11386 (or 11383 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 1125531 is about 1060.9104580501. The cubic root of 1125531 is about 104.0205519048.

The spelling of 1125531 in words is "one million, one hundred twenty-five thousand, five hundred thirty-one".