1131523 has 2 divisors, whose sum is σ = 1131524. Its totient is φ = 1131522.

The previous prime is 1131509. The next prime is 1131547. The reversal of 1131523 is 3251311.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1131523 - 2⁵ = 1131491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1131497 and 1131506.

It is not a weakly prime, because it can be changed into another prime (1131553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 565761 + 565762.

It is an arithmetic number, because the mean of its divisors is an integer number (565762).

2^1131523 is an apocalyptic number.

1131523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1131523 is an equidigital number, since it uses as much as digits as its factorization.

1131523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90, while the sum is 16.

The square root of 1131523 is about 1063.7306990023. The cubic root of 1131523 is about 104.2048170304.

Adding to 1131523 its reverse (3251311), we get a palindrome (4382834).

The spelling of 1131523 in words is "one million, one hundred thirty-one thousand, five hundred twenty-three".