11520531 has 36 divisors (see below), whose sum is σ = 18673200. Its totient is φ = 6837600.

The previous prime is 11520473. The next prime is 11520559. The reversal of 11520531 is 13502511.

11520531 is a `hidden beast` number, since 115 + 20 + 531 = 666.

It is not a de Polignac number, because 11520531 - 2¹⁴ = 11504147 is a prime.

It is a super-2 number, since 2×11520531² = 265445269043922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11520571) 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 in 35 ways as a sum of consecutive naturals, for example, 77245 + ... + 77393.

It is an arithmetic number, because the mean of its divisors is an integer number (518700).

Almost surely, 2^11520531 is an apocalyptic number.

11520531 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11520531 is a deficient number, since it is larger than the sum of its proper divisors (7152669).

11520531 is a wasteful number, since it uses less digits than its factorization.

11520531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 234 counting only the distinct ones).

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

The square root of 11520531 is about 3394.1907724817. The cubic root of 11520531 is about 225.8521169485.

The spelling of 11520531 in words is "eleven million, five hundred twenty thousand, five hundred thirty-one".