1125133531 has 2 divisors, whose sum is σ = 1125133532. Its totient is φ = 1125133530.

The previous prime is 1125133511. The next prime is 1125133579. The reversal of 1125133531 is 1353315211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1125133531 - 2⁷ = 1125133403 is a prime.

It is a super-2 number, since 2×1125133531² = 2531850925161055922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1125133496 and 1125133505.

It is not a weakly prime, because it can be changed into another prime (1125133501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562566765 + 562566766.

It is an arithmetic number, because the mean of its divisors is an integer number (562566766).

Almost surely, 2^1125133531 is an apocalyptic number.

1125133531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125133531 is an equidigital number, since it uses as much as digits as its factorization.

1125133531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 25.

The square root of 1125133531 is about 33543.0101660540. The cubic root of 1125133531 is about 1040.0830588866.

Adding to 1125133531 its reverse (1353315211), we get a palindrome (2478448742).

The spelling of 1125133531 in words is "one billion, one hundred twenty-five million, one hundred thirty-three thousand, five hundred thirty-one".